0 Hourglass Dolphin

 

Animal Unique | Hourglass Dolphin | The Hourglass dolphin is a small dolphin family Delphinidae. Although traditionally placed in the genus Lagenorhynchus, recent molecular analysis indicates that the hourglass dolphin, in fact more closely related to the dolphins of the genus Cephalorhynchus. The Hourglass dolphin is the only small delphinids often is south of the Antarctic convergence observed. It is probably in the circumpolar pelagic waters of the subantarctic and Antarctic regions south of the Subtropical Convergence.

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Order:     Cetacea
Family:     Delphinidae
Genus:     Lagenorhynchus
Species:     L. cruciger

The Hourglass dolphin is colored black and white, and for this reason was colloquially known by whalers as a "sea cow". Each side has a white spot at the front, above the beak, eye and flipper, and a second patch on the back. These two sites are connected by a thin white strip, creating, loosely speaking, an hourglass shape and hence the common name of the dolphin. In his usual assortment of dolphin is easily recognizable. Only the southern right whale dolphin is of comparable size and lives in the south. The right whale dolphin is not a dorsal fin, so that the two species are easily distinguished. The fin varies greatly between individuals. It is generally long and curved, and the curve may be particularly pronounced in older animals.

Hourglass dolphins are beautiful, black and white dolphins. They are found in the Antarctic and subantarctic. It is rarely seen near land. Very little is known about this particular dolphin. The scientists say that dolphins are "avid bow riders." Which means they drive along the front (bow) of a boat. The boat attracts them and makes them swim faster. These dolphins have been seen in the company of Arnoux's beaked whales, fin whales, sei and minke whales.

Hourglass dolphins primarily feed on fish, squid and crustaceans. They have been seen eating in large groups near the surface, which attracts seabirds and helps research vessels are groups of hourglass dolphins. Hourglass dolphins tend to move in groups of about 5 to 10. They share feeding grounds with other cetaceans, such as sei, pilot, minke and southern right whale and bottlenose dolphins. They are regularly seen with fin whales.

Like all toothed whales, the Hourglass dolphin uses echolocation for orientation and prey location. A recent study showed that this species is very high button, causing the prey to detect more than twice the distance of the other dolphin species produces. It is thought that the hourglass dolphin is likely to communicate using sight and touch. There are no known specific threats to the hourglass dolphin. It is thought that the species probably attacked by killer whales, but there is not no documented evidence of predation. The hourglass dolphin is not commercially hunted and accidental bycatch is limited

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Detail: Hourglass Dolphin

0 Melon Headed Whale

 

Animal Unique | Melon Headed Whale | Melon head whale is a cetacean of the oceanic dolphin family (Delphinidae). It is closely related to the pygmy killer whale and the pilot whale. The other names are Many toothed blackfish and Electra dolphin. The Melon head whale is widespread in tropical waters of the world, but not often seen by humans because they prefer deep water. Melon head whales travel in pods of 100-1000, even though larger pads have also been reported. They feed mainly on squid and fish.

Scientific classification e
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Order:     Cetacea
Family:     Delphinidae
Genus:     Peponocephala
Species:     P. electra

Melon head whale are dark gray to black in color with white to light gray color on their belly (bottom) side and, like the pygmy killer whale, white lips. The black triangular "mask" on the face distinguishes them from the more uniformly colored pygmy killer whales. Melon head whales also have a cape diving far below the dorsal fin than that of pygmy killer whales, although the margin is often vague. They reported traveling with Fraser's, spinner and spotted dolphins.

Adult males reach 2.7 m long, 2.6 m long in adult women. Their maximum weight is about 225 kg. The Melon head whale has a round head somewhat triangular when viewed from above or below. When viewed from the side, the head rounded. Females and juveniles have an indistinct beak. They have a distinct dorsal fin is located in the middle of their backs. Their flippers are long and pointed at the ends, a feature that differs from the more rounded flippers of pygmy killer whales. Melon head whales have twice as many teeth as the pygmy killer whale.

With Melon head whales, it's like a rock concert with screaming and shouting. Yelling, screaming clicks, whistles, squeaks, shrieks, whines and pops are a few of the sounds they make. Males are called bulls and females are called cows. After the birth of the cows push the calf to the surface to learn to breathe. The calf is a baby of 2 to 3 years before they grow up. Their whistle is like a song bird, screams, pops, and whines. The Melon head whale is not always open their mouths when they make noise. Whistles and clicks are the most sounds they make. The sound comes from their melon or forehead. The dolphins swirl around each other all the time.

The Melon head whales  make a low, shallow leaps out of the water while traveling quickly, often creating a lot of spray when they surface and makes it difficult to detail. Slow swimmers may lift the head straight out of the water on the pavement. They are usually wary of boats, but many observations in areas where tuna dolphin hunt regularly, so their behavior may differ elsewhere. They are known to bow-ride for short periods, and breached occasionally recorded. Sometimes they spyhop.

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Detail: Melon Headed Whale

0 Commerson's Dolphin

 

Animal Unique | Commerson's Dolphin | Commerson's dolphin is one of four dolphins in the Cephalorhynchus genus. The species has also the common names Skunk Dolphin, Piebald Dolphin and Panda Dolphin. The species is distributed over two locations. A larger population is found along the coast in various inlets in Argentina, in the Strait of Magellan and around the Falkland Islands. The second population is living near the Kerguelen Islands, 8.000 kilometers east of the nearest special cousins. They prefer shallow waters. Global populations are unknown, but the species is to be accepted locally common. Commerson's dolphin is found in two different geographical areas, the southern coast of South America around Tierra del Fuego and the Falkland Islands and the waters around the Kerguelen Islands in the southern Indian Ocean.

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Subclass:     Eutheria
Order:     Cetacea
Suborder:     Odontoceti
Family:     Delphinidae
Genus:     Cephalorhynchus
Species:     C. commersonii

Commerson's dolphin has a very distinctive patterns. He has a black head, dorsal fin and fluke, with a white throat and body. The delineation between the two colors is very clear. The dorsal fin has a long, straight edge, ending in a curved tip. The rear edge is typically concave but not falcate. The fluke has a notch in the middle. This dolphin has no rostrum. Sexes are easily distinguished by the different shape of the black patch on the belly - it is shaped like a teardrop in men, but is more rounded in females. Females reach reproductive age from six to nine years. Males are sexually mature at about the same age.

Commerson's dolphins appear to be opportunistic feeders. They consume fish, squid, and shrimp They feed mainly near the seabed. Commerson's dolphins typically eat 3.5 to 6 kilograms of food per day. This is relatively a much larger amount than or killer whales or dolphins take every day, and is due to Commerson's dolphin having a metabolism that is two to three times higher than many other species of whale or dolphin.

Commerson's dolphins are usually alone or in small groups of two to three animals were found, and occasionally spotted in larger groups of 20-30 or more dolphins. They often hunt together or round fish passage and take turns to feed the fish or even clustered driving fish onshore and temporarily beaching themselves to snatch the fish. These dolphins are often seen wave-riding in the wake of arcs or high-speed boats, coastal breakers or ground wells.

Within their reach, Commerson's dolphins are fairly common. However, some accidentally caught in fishing nets and slain during a portion of their range, particularly off the coast of Argentina. In the past, local fishermen purposely these dolphins for food, oil or bait. Now that this practice is illegal, the percentage of the hunt for the Commerson's dolphin reportedly refused. Yet it is not known how much the accidental capture of Commerson's dolphin entanglement in fishing nets still affect the population numbers. In some parts of their range Commerson's dolphins have been found with elevated levels of industrial pollutants, which is also a threat to the population numbers. Like other species of cetaceans, international laws to protect Commerson's dolphins.

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Detail: Commerson's Dolphin

0 Risso's Dolphin

 

Animal Unique | Risso's Dolphin | Risso's dolphins, also known as Grampus, is one of the larger members of the dolphin family. They are usually an offshore dolphin whose inshore appearance is unusual. They occur worldwide in temperate and tropical waters, mostly in the deep waters rather than close to land. Besides the tropical parts of the Indian, Pacific and Atlantic Oceans, Risso's dolphins are also found in the Persian Gulf, Mediterranean Sea and Red Sea, but not the Black Sea. They range as far north as the Gulf of Alaska and southern Greenland and as far south as Tierra del Fuego. Their preferred environment is just beyond the continental shelf on steep banks.

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Order:     Cetacea
Family:     Delphinidae
Genus:     Grampus
Species:     G. griseus

Risso's dolphins have a relatively large front body and the dorsal fin, while the rear tapers to a relatively narrow tail. The bulbous head has a vertical crease in front. nfants its dorsal and ventral Igray cream to brown with a white anchor-shaped area between the pectoral fins and around the mouth. In older calves, the non-white areas darken to almost black, and then illuminate (except for the always dark dorsal fin.) Linear scars mostly on social interaction eventually most of the body cover. Older people seem mostly white. Most people have 2-7 pairs of teeth, all in the lower jaw.Like most dolphins, males are usually slightly larger than females.

Risso's dolphins are found in groups of 5-50 animals, but groups usually average between 10 to 30 animals. They have been reported as solitary individuals, pairs, or in loose aggregations in the hundreds and thousands. Occasionally this type associated with other dolphins and whales. They have been reported with other species such as Bottlenose dolphins, Gray whales, rRght whale dolphins Northern, and Pacific white sided dolphins. Due to the offshore distribution of this species, primary prey appears to be squid, although they are also known to feed on a variety of fish species. While the size of their prey is unknown squid, octopi have beaks of species that grow to 12 meters long was found in the stomachs of stranded  Risso's dolphins. They use the 2-7 pairs of peg-like teeth in their lower jaws to capture prey.

By catching in fishing gear is the main threat to  Risso's dolphins. Various types of gear, including gillnets, longlines and trawls, are documented to occasionally "take" the species. Historically, large numbers of Risso's dolphins slain associated with tuna purse seine fishing in the eastern tropical Pacific. This species is directly hunted for their meat and oil in Indonesia, Japan (fishery drive), the Caribbean (Lesser Antilles), and the Solomon Islands. The population in some of these areas where fishing and hunting interactions themselves may have declined in local abundance.

Risso's dolphins are generally not approaching boats, but occasionally bow wave surfing. A notable exception was a person named Pelorus Jack, who guided boats in Admiralty Bay, Marlborough Sounds in New Zealand for over 20 years. Hunting of this species has never been particularly widespread, and the species is recognized as an abundant and safe. Risso's have been successfully taken into exile in the United States, Japan and Italy, although not with the regularity of the bottlenose dolphins and orcas. Hybrid Risso's-rockers have been bred in captivity.

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Detail: Risso's Dolphin

0 White Beaked Dolphin

 

Animal Unique | White Beaked Dolphin | White beaked dolphin is a mammal belonging to the family Delphinidae (dolphins) in the suborder Odontoceti (toothed whales). This species occurs mainly in continental shelf water depths between 50 m and 100 m and the 200 m rarely. The White beaked dolphin is endemic in the North Atlantic Ocean and is found in a band stretching across the ocean from Cape Cod to the mouth of the St. Lawrence River and south of Greenland in the west, in the center and around Iceland on the west of northern France to Spitzbergen.

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Subclass:     Eutheria
Order:     Cetacea
Suborder:     Odontoceti
Family:     Delphinidae
Genus:     Lagenorhynchus
Species:     L. albirostris

White beaked dolphin have a stocky body and vary in color from the species. Generally, these dolphins are light gray to whitish in color with distinctive markings on their bodies, such as a lighter gray stripe, a gray-brown stain, or a white chevron-shaped line in front of their dorsal fins near its blowhole . These markings may also cover their eyes. They have mouths, sometimes mottled with white light to dark gray spots, or entirely light gray in color. Their caudal fin (tail), tail and fins are generally dark gray, but sometimes have white markings at the base of their fins and the underside of their tail fin. They are almost white on the belly (bottom) sides. Juvenile White beaked dolphins have hair on their upper lip, and adults have 4-6 follicles on each side of their upper jaw.

White beaked dolphin is a large dolphin, curved dorsal fins are rounded at the ends. Their dorsal fins and flukes seem to decrease in size and mature dolphins. Their fins are large and can reach up to 19% of the total adult body length. The tail stock (the ash of their tail) of white-beaked dolphin is tapered unlike that of the Atlantic white sided dolphins, although the two species are often mistaken for each other because of their similar color.

White beaked dolphins typically form groups of 1-35 individuals, although occasionally schools of several hundred animals have been reported. The largest school observed contained about 1,500 dolphins, but groups of this size are rare and are believed to consist of several smaller subgroups. White beaked dolphins known to ride bow waves and stern behind the ride. They are agile swimmers and are often seen jumping out of the water.

The population, breeding pattern, and life expectancy of the dolphin are all unknown, although most sources estimate several hundred thousand individulas, more densely populated in the eastern North Atlantic than the west. White-beaked Dolphins are acrobatic and social animals. They will often ride the bow wave of high-speed boats and jumped away from the surface of the sea. The white-beaked dolphin is a social feeder and is often seen feeding with Orca, Fin, Humpback and whales, dolphins and other species.

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Detail: White Beaked Dolphin

0 Dusky Dolphin

 

Animal Unique | Dusky Dolphin | Dusky dolphin is a dolphin found in coastal waters in the southern hemisphere. The specific epithet is Latin for "dark" or "dim". It is very closely related genetically to the Pacific white-sided dolphin, but the current scientific consensus is that they are different. The Dusky dolphin prefers cool streams and coastal waters, but can also be found offshore. The dolphin series is patchy, with large populations in South America, southwest Africa, New Zealand and various oceanic islands with few sightings around southern Australia and Tasmania.

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Subclass:     Eutheria
Order:     Cetacea
Suborder:     Odontoceti
Family:     Delphinidae
Genus:     Lagenorhynchus
Species:     L. obscurus

The Dusky dolphin is small to medium in length compared to other species in the family. There is great variation in size between the different population areas. The back of the Dusky dolphin is dark gray or black, and the dorsal fin is striking two-tone-the leading edge matches the back in color, but the trailing edge has a much lighter gray white. Dusky dolphins have a long, light gray stain on its front leads to a short, dark gray bill. The throat and belly are white, and the beak and lower jaw are dark gray. There are two blazes of white color goes back to the body of the dorsal fin to the tail. Right between the white areas remains a characteristic thorn-shaped spot of dark color, so the species can be easily recognized.

Apart from that, Dusky dolphins can be confused with other members of their family when observed at sea. It can be distinguished from the common dolphin, which is a more prominent and longer beak and yellow markings have flank. The skull of a black dolphin has a longer and narrower rostrum than that of an hourglass dolphin Peale's dolphin, or of the same age and size. Dusky dolphins are seen diving in groups and individually. Dusky dolphins are a curious species, they bow to ride and seem to enjoy contact with boats and people. They are very agile swimmers and are known for their acrobatics.

Dusky dolphins prey consume a variety of fish and squid species. Common species are eaten anchovies, lantern fish, sardines, sculpin, hake, horse mackerel, hoki and red cod. They tend to coordinate hunters. These dolphins have a highly flexible foraging strategies that can change depending on the environment. He dolphins use their echolocation to detect and isolate an individual prey. Groups of foraging Dusky dolphins tend to increase when the layer is close to the surface and when it falls down.

In general, three different types of sounds produced by dolphins (and other toothed whales). These are the trains, providing a range of single clicks, usually broadband signals with fast rise time, burst pulses, which are individual clicks, which repetition is so high that they are heard by people just like a buzzing sound and bubbles , which are pure-tone, narrow-band frequency modulated signals, which varies in frequency with time. Dusky dolphins are included for all three sounds, but mostly to burst pulses.Whistling is more common in dark dolphins mixed with other species such as dolphins, common dolphins. Dusky dolphins broadband project short duration echolocation signals similar to those of other whistle-producing toothed whales.

Dusky dolphins are popular attractions for whale-watching tours. Dusky dolphins performing a number of aerial displays. Displays include jumps, back laps, laps head, tail laps, spins and nose outs. The Dusky dolphin also perform head-to-tail jumps is considered the most "acrobatic" of the displays. For about a re-entry is performed when a dolphin jumps out of the water and then arches his back and flips the tail strongly over a re-entry to make. In "fuck", it does expect the same movement snout and tail do not leave the water and the dolphin is curvature

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Detail: Dusky Dolphin

0 Killer Whale

Animal Unique | Killer Whale | Killer whale, commonly referred to as the orca, and less often as the Blackfish is a toothed whale belonging to the oceanic dolphin family. Besides humans, Killer whales are the most widespread mammal. Although Killer whale can be found in both open ocean and coastal waters, they primarily inhabit the continental shelf. In cold water areas, their distribution is limited by seasonal pack ice. Killer whales are found in all oceans and most seas. Due to their enormous range, number and density estimates are difficult to compare distributional effects, but they clearly prefer higher latitudes than pelagic and coastal environments.

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Order:     Cetacea
Suborder:     Odontoceti
Family:     Delphinidae
Genus:     Orcinus, Fitzinger, 1860
Species:     O. orca

Killer whales have a distinctive black back, white chest and sides and a white patch above and behind the eye. Calves are born with a yellow or orange tint, which fades to white. Killer whales have a heavy and robust body and a large dorsal fin. Behind the fin, they have a dark gray "saddle patch" on the back. Antarctic Killer whales may have pale gray to nearly white backs. Adult Killer whales are very distinctive and are not usually confused with another marine animal.

The Killer whale's teeth are very strong and covered with glaze. His jaws are powerful gripping device, such as the upper teeth fall into the space between the lower teeth when the mouth is closed. The front teeth are slightly inclined forward and outward, allowing the killer to withstand vigorous shaking movements of his prey, while the middle and back teeth hold it firmly in place. Killer whales are the largest remaining members of the dolphin family. The Killer whale has large size and strength make it the fastest marine mammals.

Killer whales are often seen traveling in pods of between 3-25 individuals, usually including at least one great man. The pectoral fins are large and round, like paddles. Males have significantly larger pectoral fins than females.the male dorsal fin is more than twice the size of the female and is more of a triangular shape, a tall, elongated isosceles triangle, while hair is shorter and more curved. Males and females have different patterns of black and white skin in the genital area. Sexual dimorphism is also evident in the skull, adult males have a lower jaw longer than women, and have greater occipital.

Individual Killer whales can often be identified by the dorsal fin and saddle patch. Variations such as nicks, scratches and tears on the dorsal fin and the pattern of white or gray patch are unique in the saddle. White Killer whales rarely occur under normal killer whales, but are rare. Killer whales have good eyes above and below the water, excellent hearing and a good sense of touch. They can detect the location and characteristics of birds of prey and other objects in their environment by emitting clicking and listening to echoes.

Fish, squid, seals, sea lions, walruses, birds, turtles, otters, penguins, cetaceans (both mysticete and odontocete), polar bears have, reptiles, and even a moose all found in the stomach contents of killer whales. And, as their common name suggests, are the remains of other orcas also found in the stomachs of these "Killer whales." It is uncertain why these animals are cannibalistic. Like packs of wolves or lions, Killer whales often hunt together in pods for food. They work together to herd prey into a small space to attack. When hunting a large whale, a pod of Killer whales attacking from different angles.

Killer whales are very advanced and effective predators. Twenty-two Killer whales have been recorded as prey, to examine the stomach contents, scars on the body of the prey, or food intake. Groups even bigger attack cetaceans such as minke whales, gray whales, sperm whales or blue whales and rare. Hunting large whales usually takes several hours. Killer whales generally choose instead to attack young or weak animals. However, a group of five or more attacks a healthy adult. When hunting a young whale, a group chases her and her mother, until they wear out.

Like all whales, Killer whales are highly dependent on underwater sound for orientation, feeding, and communication. Killer whales produce three categories of sounds: clicks, whistles and pulsed calls. Clicks are believed to primarily be used for navigation and discriminating prey and other objects in the environment, but are often heard during social interactions. Killer whales are the second heaviest brains among mammals. They can be trained in captivity and are often described as intelligent, although defining and measuring "intelligence" is difficult in a species environment and behavioral strategies are very different from that of humans.  Although, it is a predator, no attack on a human by an  Killer whale ever recorded was in the wild.  Killer whale are not considered an endangered species in general.

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Detail: Killer Whale