Calling all Ichthyologists. I was told that tigerfish exude an anticoagulant onto their teeth. Is this true?

Fish oils commonly have an anticoagulant effect due to proteins found therein. I don't think fish are smart enough to have a strategy about anything. Many fish that have teeth also happen to be more oily due to physiology and a diet of other fish.

I downloaded a pic of a tigerfish that I got from somewhere, and it looks like a striper on steroids. The way the body is so muscular, and that mouth full of teeth says "KILLER" all over it's evil-looking grin. It wouldn't surprise me one bit that what the guides told you is true. I guess crocs, lions, & hyenas aren't all that the elephants, gazelles, etc., have to llook out for. And maybe that's the reason they say that hippo's have such a bad disposition, ......, so would I, if I had something like that swimming around my family jewels. Then again if all I had to eat was hippo, rhino, or elephant to chew on for breakfast, then I think I would need some real teeth too!

Goodluck & Good fishing