Pinnipedia.
Bio mammals
an ocean mammal with flippers
I believe defalcates
Cetaceans, Pinnipeds and the like.
Sea mammals have large flippers and the y swim or can propel themselves slowly on land.
UM, ducks, geese. Its mostly mammals that live in water.
Whales are aquatic mammals, meaning that a fluke and flippers are better than legs for these creatures.
carnivorous aquatic mammals that include the seals, walruses, and similar animals having finlike flippers as organs of locomotion.
Turtles, seals, sea lions, whales, dolphins, sharks, and things such as clams. *Well clams do not have flippers exactly, but they clamp their shells and it launches them* I hope that helped a bit ^^
The scientific term for a baby in the womb is "fetus." This term is used to describe the developing offspring of mammals after the embryonic stage and before birth.
Four-legged mammals are not a species (or any kind of taxon), so they do not have a scientific name.
the scientific name for the class is mammalia