Doug Perrine / Giant squirrelfish (Sargocentron spiniferum) at cleaning station in the cockpit of wreck of Panorama Air Tour Beech H18S that crashed in 1983 after take-off from Keahole airport, Kona, Hawaii.

Alex Mustard / World War II British motorbikes (Norton 16H) stacked up on the back of truck in the hold of wreck of HMS Thistlegorm, with soldierfish (Myripristis murdjan) swimming above. Sha'ab Ali, Sinai, Egypt. R...

Alex Mustard / World War II British motorbikes (Norton 16H) stacked up on the back of truck in the hold of wreck of HMS Thistlegorm, with Soldierfish (Myripristis murdjan) swimming above. Sha'ab Ali, Sinai, Egypt. R...

Jeff Rotman / Spotfin Squirrelfish (Neoniphon sammara) caught in Bedouin gill net, Egypt, Red Sea

Fred Bavendam / White-tipped Soldierfish (Myripristis vittata) school, Nusa Penida, Indonesia

Flip Nicklin / Squirrelfish (Holocentrus sp) schooling at reef, Cocos Island, Costa Rica

Flip Nicklin / Squirrelfish (Holocentrus sp) schooling at reef, Cocos Island, Costa Rica

Alex Mustard / A British World War II Ford (Fordson) WOT3 truck inside the lower level of the hold (hold 2, port side) of the SS Thistlegorm wreck, with Red Sea soldierfish (Myripristis murdjan). Sha'ab Ali, Sin...

Alex Mustard / Reef manta (Mobula alfredi) visiting a cleaning station on a coral reef with a school of Onespot snappers (Lutjanus monostigma), Oriental sweetlips (Plectorhinchus vittatus) and Sabre squirrelfish (Sa...

Franco Banfi / Shoal of Bigscale soldierfish (Myripristis berndti), Dominica, Caribbean Sea, Atlantic Ocean

John Shaw / Yellow-billed cardinal (Paroaria capitata). Pantanal, Brazil, September.

Nick Hawkins / Squirrelfish (Holocentrus sp) shoal amongst rocks. Near Cocos Island National Park, Costa Rica.