They may easily be a top contender for most repulsive species in our vast oceans. Lacking beauty, the females lure their males by releasing a pheromone and flashing a bioluminescent lure attached to their heads. The males begin mating by biting the stomach of the female and latching on. The two then take the mantra of two shall become one to heart, as the male fuses its blood vessels and skin with its mate. The male receives all essential nutrients from the female, leaving no need for its eyes and fins which degenerate. Eventually, the male becomes a lump of flesh protruding from the female and provides sperm for reproduction when she is ready to spawn.