"Granular Poromya" (Poromya granulata)
…a unusual species of poromyid bivalve that occurs in the northern parts of the Atlantic ocean. P.granulata is unusual among bivalves because unlike most it is a carnivore, using its modified cowl-shaped siphon to catch its prey. To accomplish this P. granulata will draw water through its siphon and when it has trapped a food item it will rapidly retract it. In doing this the bivalve turns itself inside out and moves the food into the ‘mouth’. Which is an opening into the gizzard, where the food item will be ground up and passed onto the gut.
Images: Brian Morton and Idscaro
Don’t know why, but the thought of a carnivorous bivalve is creepy.
Ditto… A carnivorous bivalve is creepy.