Deep Sea Glass Squid, a semi-transparent sea creature with big luminescent eyes and tentacles. Divers who encounter this animal underwater might think they were about to be abducted by ET. One gander at this blue, semi-transparent organism with its bioluminescent eyes and tentacles and its hard to imagine anything more alien-like. It may look terrifying, but it's actually quite delicate, with a very thin skin and is the prey of many deep sea fish, whales and oceanic seabirds.