A sea otter has 4 legs.
yes it does
The sea otter is usually solitary when it comes to mating.
a sea otter can have 1 baby per year.
Too many to count and each otter has a different number.
The sea otter can have only one baby per day but if it wants to mate, the sea otter can have up to 200 baby's in a life time.
A sea otter is blackish brown.
in 1832 the sea otter was discovered
Yes, there are many different otters, so, I would say any of those! For example; Eurasian Otter, Marine Otter, Smooth-coated Otter, Southern River Otter, Hairy-nosed Otter, Neotropical Otter and many, many more!
Sea otter is a marine mammal.
A sea otter is a member of the Family Mustelidae.
The sea otter is a mammal and is a vertebrate.