Gary Bell/ Oceanwide / Painted Frogfish (Antennarius pictus), Anilao, Philippines

Alex Mustard / Oceanic manta ray (Mobula birostris) with cephalic fins curled as classic devil ray horns, accompanied by two Remoras (Remora remora), Revillagigedo Islands, Mexico, Pacific Ocean

Alex Mustard / Oceanic manta ray (Mobula birostris) with cephalic fins curled as classic devil ray horns, Revillagigedo Islands, Mexico, Pacific Ocean.

Sirachai Arunrugstichai / Giant devil ray (Mobula mobular) caught by a commercial purse seiner, prior to release back into the sea, Andaman Sea, Thailand, Krabi Province, Thailand, December 2015.

Mark Carwardine / Spinetail devil ray (Mobula mobular), five with reflections of sun on water, aerial view. Sea of Cortez, Baja California, Mexico. March.

Mark Carwardine / Spinetail devil ray (Mobula mobular), four with rays of light and sparkle of sun on water, aerial view. Sea of Cortez, Baja California, Mexico. March.