2759b964_ference____Aquarium_of_the_Bay__Sea_Otters
[River Otters] Eat fish, frogs, crayfish, bugs, rats, and birds [Sea Otters] 
Eat urchins, crabs, clams, octopuses
River Otters Versus Sea Otters: What’s the Difference? | Aquarium of the Bay
Sea Otters