Gary Bell/ Oceanwide / Painted Sweetlips (Diagramma pictum) in Slender Cardinalfish (Rhabdamia gracilis) school, Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Painted Sweetlips (Diagramma pictum) in Slender Cardinalfish (Rhabdamia gracilis) school near Double-headed Maori Wrasse (Cheilinus undulatus), Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Double-headed Maori Wrasse (Cheilinus undulatus), Painted Sweetlips (Diagramma pictum), and Slender Cardinalfish (Rhabdamia gracilis) school, Great Barrier Reef, Queensland, Australia

Gary Bell/ Oceanwide / Spotted Wobbegong (Orectolobus maculatus) surrounded by Slender Cardinalfish (Rhabdamia gracilis) school, Solitary Islands Marine Park, New South Wales, Australia

Fred Bavendam / Pygmy Sweeper (Parapriacanthus ransonneti) and Slender Cardinalfish (Rhabdamia gracilis) schooling near a Sea Fan, Andaman Sea, Thailand