Nuclear-follower foraging behaviour between Western Australian common octopus and brown-spotted wrasse

Abstract

A common feeding association among reef fishes involves nuclear and follower species, where the former disturbs the bottom, during which the latter opportunistically feeds on items exposed. Here, we report such interactions between Western Australian common octopuses (Octopus (cf) tetricus) and brown-spotted wrasse (Notolabrus parilus) observed on eight occasions while snorkeling at four temperate-water reefs along the coast of Perth in Western Australia. We compare the interactions observed to other octopus-fish nuclear-follower associations known. In general, these interactions usually benefit the follower species and could play a significant role on reef trophodynamics.