inside the tank??Looks like a wasp or hornet head. When they fight they often bite the heads off their opponents. If it is a full centimeter that would be pretty big. The image quality is a bit low so it is still a guess, but the upper right sure looks like mandibles from a wasp.
I think you got it.Looks like a wasp or hornet head. When they fight they often bite the heads off their opponents. If it is a full centimeter that would be pretty big. The image quality is a bit low so it is still a guess, but the upper right sure looks like mandibles from a wasp.
Oh goodness yes that’s a possibility looking at this.. I’ll do some reading on themBefore you settle on wasp head, look as some pics of Argulus, aka fish lice.