After the elephant and rhinoceros, the hippopotamus is the third-largest type of land mammal and is the heaviest extant artiodactyl
Crocodile
– Crocodiles (family Crocodylidae) or true crocodiles are large semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia.
sea otter
– Otters are part of the mammal family called mustelids, which includes ferrets, badgers, minks and weasels.
water snail
– At least 33–38 independent lineages of gastropods have successfully colonized freshwater environments.
Seahorse
– They are unique in appearance, with their horselike head, prehensile tail, independently moving eyes, and brood pouch.
penguin
They are about 71 – 76 cm tall and weigh about 4.5 kg and are the most numerous of penguins, with a population of about 12-13 million,
Octopus
– Octopuses appear in mythology as sea monsters like the kraken of Norway and the akkorokamui of the ainu, and probably the gorgon of ancient Greece.
sea snakes
– All sea snakes have paddle-like tails and many have laterally compressed bodies that give them an eel-like appearance.
Platypus
– These animals build their holes at the very edge of the water and feed on underwater worms, mollusks and insects.