Cave fisher

A cave fisher was a crab-like monster which inhabited subterranean locations like the Underdark and ambushed its prey. The cave fisher hides on ledges and hunts by emitting a long strand of sticky filament. Once caught, prey does not easily escape. Almost every part of a cave fisher is useable after the creature has been killed. It's blood is used for several dwarven spirits, although some dwarves drink the blood straight. Once gathered, cave fisher filaments can be woven into rope that is thin, tough, and nearly invisible. Cave fisher meat is edible, tasting much like crab cooked in strong wine, and the shell is used for armor, tools, and jewelery.