River otters live in the shores of fresh water regions.
River otters live on river shores. River otters hold there breath when going under water. They also use sticks and branches to build a dam in the water.
mammals can give birth to live young they have hair on their bodies and they can produce milk.
on fresh salt water
NO! There is fresh and non fresh water every were in the world. There is more fresh water in wet places than in dry places.
non-renewable
Mammals Have Hair Or Fur, Non-Mammals Don't.
non-salted water is most often referred to as "fresh water" or non-salinated water.
You mean, what mammals lay eggs rather than giving live birth? The only mammals that lay eggs are the five species of monotremes: the platypus, and four species of echidnas.
other small non aggressive mammals are best.
No. There are non-mammalian carnivores that live in the ocean, such as sharks.
a sea star is non living
The only animals that suckle are mammals, but not all mammals give live birth (the monotremes do not). So the answer to your question is "non-monotreme mammals," but there is no common official term for them.
Bison, being non egg laying mammals, do bear live young.