This critter (see attachment - not diagram) came to my attention by pricking me in the hand with a hook in its tail. About 7mm long. Flattened profile. Prehensile hook in tail. Two tusk-like appendages straight out front. Very active, very supple. Must be a larva of some sort. Ideas? Reminds me very much of a shrimp or of the "ear bug" from Wrath of Khan.