usually one but sometimes twins
a sea otter can have 1 baby per year.
like sea otters, but smaller
The sea otter is usually solitary when it comes to mating.
Seals Sea Lions sea otter
Sea Otters usually have one pup at a time. Sometimes, there are twins, but more often a single pup is born to the mother. During her lifetime, a female may have many pups.A sea otter typically bears only one pup at a time. Sometimes a sea otter will have twins; however, one of the pups will be abandoned, for a sea-otter mother can care for only one pup at a time.
Usually only one will survive.
many
Sea otters are the only species in their genus, Enhydra. However, there are thirteen species of otter in the subfamily Lutrinae; these include the Marine otter, the North-American river otter, the Neotropical river otter, the Southern river otter, the Eurasian otter, the Hairy-nosed otter, the Asian small-clawed otter, the African clawless otter, the Congo clawless otter, the Giant otter, the Smooth-coated otter, the Spotted-necked otter, and (of course) the Sea otter.
I DON'T KNOW HOW THEY CARRY THEIR BABIES BUT It is not known how long the gestation of a sea otter is, but the longest known gestation have been twelve months. YA DIGG :D
I think mammals... but I am not 100% sure...
They have one young at a time...........
The sea otter is a mammal and is a vertebrate.