leech on the glass. bloodsucking animal. subclass of ringworms from the belt-type class.

alternative ancient animal annelid belttype bite black blood bloodsucker bloodsucking care class clitellum closed crabs dangerous disgust doctor glass healing health healthy heparin hermaphrodite hirudotherapy illness invertebrate jar leech leeching medical medicinal medicine nature paraphyletic parasite plastic procedure research ricefieldcrabs ringworms science skin subclass suck sucker sucking suction tentacle therapy water wet worm zoology