This fellow is a crocodile that I inherited from a great aunt, now long passed away. I know she traveled Asia in the 1950s, including Japan. This croc came in a box of mostly Japanese figures, some of which are ivory, and a couple of which could be resin or even plastic.
So: This looks like a carved walrus tusk. Did Japanese craftsmen create such things in the 1950s? I usually associate ivory crocodiles with Africa. Have you seen any from Japan as well?
This guy has a thin crack on his long side, but is in overall excellent condition. 11" U.S. from tip to tip and 2" at the widest. I have no idea on how to even value it, although houseguests "in the know" have bandied $500 about, but that was over 10 years ago. This is a family piece, so there is no desire to ever sell it.