Acanthochromis polyacanthus, the spiny chromis damselfish, is a damselfish from the Western Pacific, which is highly abundant on the Great Barrier Reef, Australia. Unlike many other coral reef fishes, A. polyacanthus has direct development of their larvae, which means that the parents protect their brood from the egg stage (which are laid on the reef), through hatching and onto the fully developed juvenile stage (Kavanagh 2000). There is no pelagic larval stage (unlike the vast majority...