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

Peter Scoones / Long jawed squirrelfish {Sargocentron spiniferum} in wreck, Red Sea

Michael Pitts / Shoal of Hawaiian squirrelfish {Sargocentron xantherythrum}, Midway Islands, Pacific

Doug Perrine / Giant brain coral provides shelter for Grunts and Squirrelfish, Florida Keys, USA.

Michael Pitts / Longspine squirrelfish {Holocentrus rufus} on the wreck of the SS Rhone, British Virgin Is, Caribbean.

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

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

Pascal Kobeh / Cup coral (Turbinaria mesenterina) housing Blackblotch or blackspot squirrelfish (Sargocentron melanospilos) and a longfin bannerfish (Heniochus acuminatus), New Caledonia, Pacific Ocean.

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...