Thanks Chli, I can see the "manes" or crests in all these animals (the one that I don't knew is the cheetah, I was assuming something aboit the dorsal hair of the adult), just these really have not much reasons to be called a mane, being much smaller and almost unnoticeable than, for example, a lion mane. Well, in the case of sealions, I don't know. I always assumed that the thick neck of males are just neck flesh. Are you meaning that all this volume is actually hair? A shaved male sea lion would looks like thin-necked?