Under the "wrong" conditions/circumstances like rough handling, objectionable water quality, pheromonal cue-ing, pushy tankmates, pump/siphon intakes, sea cucumbers are known to eviscerate. Hey, one of my favorite terms... basically cast out their respiratory trees, gonads, gastro-intestinal and it's contents, most everything but the kitchen sink through their mouth and anus. This can be a very big bummer as they say in the sciences, with consequent poisoning/pollution/death & destruction to all other desirable tank-system-mates.