BECAUSE THEY WERE BORN LIKE THAT !
lmfaooo. no I'm kidding.. i don't know how. I'm not a genius here..
but their gills let them that's one (:
Note: No mammal has gills after birth. They have an enhanced lung capacity, like whales, seals, polar bears, etc, that lets them hold their breath longer than other mammals can. They also tend to have a lot of blubber and protective fur, that allows them to survive the frigid temperatures of most aquatic habitats.
Those animals that live in the water 24/7-- meaning that they never venture onto land, the way otters, beavers, etc, can-- are only able to sleep by 'turning off' portions of their brain at a time. A part of them rests, another part remains active and awake so that they don't sink below the surface and drown.
The Order Cetacea are the biggest group of mammals that spend their entire lives in the water, this includes whales and dolphins. But there are also manatees, which are mammals but not otherwise related to the cetaceans.
some do, they are things such as whales and dolphins
Mammals that live in the ocean are known as marine mammals. They include sea otter, whales, dolphins, leopard seal and many more.
No. Lions, tigers, porcupines, etc all live on land.
No.
Most mammals live on land. Some, like hippos, otters and beavers, live partly in water.
Only a few live entirely in water, like whales, dolphins and manatees.
A whale
No, humans are mammals...
because they cannot live out of the water and yes they are mammals!!
Plainly and simply, no... other than whales.
land mammals live on land, sea mammals live in the water.
fish, aquatic mammals, aquatic bugs, ect. i think that is the answer to your question but im not sure.
Aquatic mammals are mammals that can swim and live in water if necessary.
no
whales
Yes, mammals like Manatee, dugong, whales and dolphins all live in salt water.
No. Platypuses can only live in cool temperate to tropical climates, and alongside fresh water sources such as creeks and rivers. There are no creeks or rivers in Antarctica as it is a frozen continent. The only mammals that live anywhere near the Antarctic are marine mammals such as whales.
yes. Look at the beaver. It live most of its life in the water. So do dolphins and mammals
They generally call animals that live only in water fish, but there is certain categories that they can go under. For instance, some fish are actually mammals.