Z-Gulls are amphibious lifeforms, native to Zoness that once lived a peacefully on the tropical vacation world. However, Andross's bio-weapon has polluted the once beautiful oceans and transformed the beautiful sea creatures into hideous monstrosities. They had also been trained to drop energy balls on enemies, and were durable enough to withstand regular laser fire. Each mindless bio-tech drone had been conditioned to think only one thought: Destroy Star Fox or be destroyed.