Male seahorses possess a pouch on their frontside, similar to kangaroos. During mating, the male will pump seawater into the pouch to expand and reveal its sad emptiness to the courting female. The female, feeling very bad about the emptiness, will then deposit eggs into the pouch. She does this deed with her ovipositor, an appendage for egg laying just like the one of the Alien Queen in Aliens. The male now washes the eggs in sperm.