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Try maybe doing a fund that can help otters or join one!
I don't know all of them, so sorry if this doesn't help, but I have Giant Tortoise, and I know people with rabbits, rhinos, otters.. there are many of them!
We can help Sea Otters by not throwing trash in the oceans and lakes
There is an animal profile for Giant Otters on the Philadelphia Zoo website that provides a few adaptation examples. To quickly highlight some of the information found here, the profile says that giant otters have flattened tails that help them to swim underwater faster and maneuver more easily. They also have fully webbed toes. Furthermore, giant otter fur is very dense and prevents water from touching the otter's skin. Another great place to read more about Giant Otters is the World Association of Zoos and Aquariums The animal profile here offers several brief facts as well as a very cute picture! The otter's sharp claws are mentioned on the Philadelphia Zoo site, but WAZA's fact sheets describes digging as one of an otter's favorite activities. One specific way that they use their claws is to help dig underground sleeping dens. WAZA also describes the otter's family structure. Otters mate for life and live in family groups. Parents and older siblings help to take care of new cubs. As with humans, otters are very social animals.
People are rescuing hurt and injured sea otters to help keep them from becoming extinct. They treat the animals and then release them back. People are also raising awareness about the sea otter, which encourages others to take an interest in them and do what they can to help.
Much is being done to protect the Giant Otter. In 1973, CITES classified the Giant Otter as endangered and banned all trade pelts. The Philadelphia zoo opened up the first North American exhibit of Giant Otters in order to increase public awareness. Finally, a sanctuary for Giant Otters and other native endangered species was created in 1995. It is an 81510 acre lot on the Duroche Ranch, and was created by the Nature Conservancy with Ecotropica.
sea otters do have hollow fur to help them float... so yes sea otters have hollow hair.
they are doing nothing at all to help the penguins to not be extinct
"Monterrey Bay Aquarium has developed a method for preparing mother" swims with the young otters in the ocean by the aquarium, helping them learn to find food and adjust to the wild.
keep them in a cage
people are creating a global sanctuary.
There paws help Giant pandas survive