leech. set of bloodsucking insects

alternative animal annelida aquatic artwork background black blood bloodletting breeding cartoon clipart contour creature cure dangerous flat freshwater hematophagous hematophagy hermaphrodite hirudapy hirudin hirudo icon illustration isolated leech marine medical medicinal medicinalis medicine parasite pictogram predatory saliva shape slimy soft sphere spheric sucker sucking symbol tentacle vector virus white worm yucky