" a bearphin is a believed to be extinct [marine mammal] closely related to the [sea lion] or [walrus]
noun: a large furry, bear-like marine mammal characterized by large claws, body of fur, and dolphin- like behavior when fishing or swimming
"" a bearphin is a believed to be extinct [marine mammal] closely related to the [sea lion] or [walrus]" What is the definition of "bearphin"?