More ideas from PORCO
Compared to its seal and sea lion cousins, the walrus looks like an oddball. There’s a good reason for that. The wrinkly, tusked marine mammal is the last surviving member of a pinniped group that proliferated during prehistory but is down to just a single species, Odobenus rosmarus.

In the past, the Odobenidae (walrus) group was much more diverse, and includes more than ten fossil genera. Today only the modern walrus is left. Walrus By Captain Budd Christman, NOAA Corps - NOAA's Ark