Mosquito
Mosquitoes of the genus "Toxorhynchites" never drink blood. This genus includes the largest extant mosquitoes, the larvae of which prey on the larvae of other mosquitoes. These mosquito eaters have been used in the past as mosquito control agents, with varying success.
Largest organisms
The largest of the segmented worms (commonly called earthworms) is the African giant earthworm ("Microchaetus rappi"). Although it averages about in length, this huge worm can reach a length of as much as and can weigh over . Only the giant Gippsland earthworm, "Megascolides australis", and a few giant polychaetes, including the notorious "Eunice aphroditois", reach nearly comparable sizes, reaching , respectively.