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Diet: Fish, squid, and crustaceans; Habitat: Northern hemisphere coastlines; Characteristics: Spotted coat, does not migrate far from birthplace

Diet: Herbivore - mainly seagrasses; Habitat: Shallow, slow-moving rivers, estuaries, saltwater bays; Characteristics: Also known as 'sea cows', slow reproduction rate

Diet: Krill and other small sea creatures; Habitat: Worldwide oceans; Characteristics: Largest animal ever known to have existed

Diet: Fish and squid; Habitat: Worldwide, mostly in shallow seas of the continental shelves; Characteristics: High intelligence, sociable, and often displays playful behavior

Diet: Mainly fish and squid; Habitat: Warmer oceans worldwide, particularly in shallow seas; Characteristics: Well-known for its intelligence and acrobatic displays

Diet: Krill, and small fish; Habitat: Worldwide in all major oceans; Characteristics: Known for breaching and complex songs

Diet: Fish and invertebrates; Habitat: Antarctic ice; Characteristics: Known for its ability to create breathing holes in the ice using its teeth

Diet: Fish, seals, and even other whales; Habitat: All oceans, from the polar regions to the equator; Characteristics: Apex predator, sophisticated social structure

Diet: Squid, and occasionally fish and crustaceans; Habitat: Deep waters of oceans worldwide, generally temperate and tropical regions; Characteristics: Bulbous head, heavily scarred body, and no discernible beak

Diet: Bottom dwelling creatures like amphipods; Habitat: North Pacific, with migration routes along the North American coast; Characteristics: Noted for its gray color and rough skin

Diet: Squid and fish such as anchovies and sardines; Habitat: Western North America, from British Columbia to Baja California; Characteristics: Noted for barking noises, agility, and intelligence

Diet: Bivalve mollusks, sea cucumbers, shrimp; Habitat: Arctic regions; Characteristics: Long tusks, whiskers, and significant blubber

Diet: Primarily seals; Habitat: Arctic sea ice regions; Characteristics: Largest land carnivore, strikingly white fur, and a skilled swimmer

Diet: Fish, shrimp, squid; Habitat: Arctic waters; Characteristics: Known for its long, spiral tusk

Diet: Squid, deep sea fish; Habitat: Global distribution in deep waters; Characteristics: Largest brain of any animal, squared head, and deep diver

Diet: Zooplankton, mainly crustaceans called copepods; Habitat: Arctic and sub-Arctic waters; Characteristics: Bow-shaped head that can break through ice, long baleen plates

Diet: Fish and squid; Habitat: North Pacific Ocean, breeding on rocky islands; Characteristics: Luxurious underfur, exploited for fur trade in the past

Diet: Urchins, clams, crabs, snails, and small fish; Habitat: Northern and eastern North Pacific Ocean; Characteristics: Possess a pouch to store food; use rocks to break open prey

Diet: Seagrass; Habitat: Warm coastal waters from East Africa to Australia; Characteristics: Fluked tail, similar in appearance to a manatee

Diet: Small schooling fish, squid, and crustaceans; Habitat: Oceans worldwide, from polar to tropical waters; Characteristics: Long, slender body known as the 'greyhound of the sea'

Diet: Krill and small fish; Habitat: All oceans, favoring cooler temperate and polar waters; Characteristics: Small size for a baleen whale, curious towards boats

Diet: Fish, crustaceans and sometimes turtles; Habitat: Freshwater rivers of the Amazon Basin; Characteristics: Pink coloration, elongated snout, unique hunting technique using tail to create mud ring

Diet: Penguins, other seals, krill, and fish; Habitat: Circum-Antarctic waters; Characteristics: Solitary, formidable predator with reptilian-like head and powerful jaws

Diet: Fish, crustaceans, and worms; Habitat: Arctic and sub-Arctic waters; Characteristics: White color, prominent forehead 'melon', highly vocal