I’m determined to get gastroliths accepted as stone tools (most definitions insist tools have to be used outside the body, or grasped while in use).
It’s not this sea lion’s fault it doesn’t have hands and has to grind its food internally! 🦭🪨🛠️
Michael Haslam
On Friday I took my *luckiest* and *most disgusting* wildlife shot so far: a California sea lion (Z. californianus) puking up a bunch of rocks! 🤮🪨 That's right - many pinnipeds use gastroliths. The gastroliths are in mid-air! 🦖🐬🦑 #nature #photography #sealion
