Stay away from these, they take your stuff and eat it right away and they do a lot of damage, if your a low level your screwed big time, if you’re a medium level sling shot it or tranquilize it and tame it, it’s nice for catching small fish in shallow water. If you’re a high level snipe these bad boys or shoot a cannonball at it and watch it go “ Flying.”
I was attacked by one while mining flint and it stole my pick. Then it got my pike when I went to fight. That's when I noticed noticed that it didn't actually "steal" what was in my hand, but just disarmed me and dropped it in the ground. Check the ground and see if your stuff is there after they attack you. My pick was laying there near the spot of the initial attack.