The cave is known to contain 69 animal species,[3] among them leeches, spiders, pseudoscorpions,[4] woodlice,[5] a centipede,[6] a water scorpion (insecta), and also a snail.[3] Of these, 33 are endemic.[3] The food chain is based on chemosynthesis in the form of methane- and sulfur-oxidizing bacteria, which in turn release nutrients for fungi and other bacteria.