Rat-tailed maggot
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Diptera
Family: Syrphidae
Rat-tailed maggots are the aquatic larval stage of certain species of Hoverflies. They are named for their long, thin posterior appendage which resembles the hairless tail of a rat. This appendage is actually a specialized respiratory organ that functions as an air siphon - pretty much a fancy butt snorkel!