Sharptooth is a fish called a Snapping dragon eel. I have a ref for his animal form, and human somewhere in my art stuff on here. He was saved by Parasite from death so he serves her loyally for it. He is a predatory fish which is why he has his teeth like he does, and kinda comes and goes as he pleases through Parasite's home. He does have a mate, his first one though was killed, and in his trying to get revenge almost died. Anymore questions? Please do ask.