I have posted these two before, but not together.
Both skulls are from the South American sea lion, Otaria flavescens, the lower skull an adult female and the upper a juvenile of unknown sex. At 24 cm, the female is pretty substantial.
Also an oldie but one of my favourites - my grey seal, Halichoerus grypus. It’s likely a young female specimen so just over 20 cm, but it is otherwise absolutely perfect and I love it.
I’m posting these because next week another pinniped should join my collection :) This time a brown fur seal, Arctocephalus pusillus. Pinnipeds are somewhat a speciality of mine, so I’m really excited! I also have another specimen reserved, from the same person, but that will have to wait until I can acquire more funds. These babies aren’t cheap ;d