Doug Perrine / Day octopus (Octopus cyanea) hunting on coral reef, exhibiting white colouration while expanding webbing between arms to trap fleeing prey with Manybar goatfish (Parupeneus multifasciatus) waiting clo...

Doug Perrine / Day octopus (Octopus cyanea) hunting on coral reef with Manybar goatfish (Parupeneus multifasciatus) waiting to catch any small fish that escape, Makako Bay, North Kona, Hawaii Island, Hawaii, Pacific...

Doug Perrine / Day octopus (Octopus cyanea) sitting on Lobe coral (Porites lobata) and placing tentacles beneath it to flush out fish, shadowed by Manybar goatfish (Parupeneus multifasciatus), their hunting partner...

David Fleetham / Manybar goatfish (Parupeneus multifasciatus) is mouth wide to be inspected by a bluestreak cleaner wrasse, Labroides dimidiatus, on a reef off the island of Yap, Micronesia.