Dr. Mah direct quoate, "Small snails (genus Stilapex) that work their way into the body wall and suck on their juices!! So, what's weirder then sea pigs??? SEA PIG SNAIL PARASITES!!!!" Photo from Australian R/V Tangaroa weekly log
Everything you ever wanted to know about sea pigs (Holothuroidea: Scotoplanes sp.) from the Echinoblog. The best part is the gastropods parasites that love them a little too much.