Pascal Kobeh / Ring-tailed / Golden cardinalfish (Ostorhinchus aureus) male incubating its eggs in its mouth, Sulu sea, Philippines

Georgette Douwma / Ring-tailed Cardinalfish (Apogon aureus) West Papua, Indonesia.

Alex Mustard / Ringtailed cardinalfish (Apogon aureus) male mouthbrooding eggs. The colour of these eggs shows that they are close to hatching. Dauin, Dumaguete, Negros, Philippines. Bohol Sea, tropical west Pacific...

Georgette Douwma / Gorgonian / Sea whip coral (Ellisella ceratophyta) with Ring tailed cardinalfish (Apogon aureus) swimming in front, West Papua, Indonesia.

Linda Pitkin / Ring-tailed Cardinalfish (Apogon aureus), hovering on coral Pantai Merah, Komodo, Indonesia.

Georgette Douwma / Ring-tailed cardinalfish (Apogon aureus) schooling in artificial reef. Mabul, Malaysia. Indo-Pacific.

Pascal Kobeh / Golden cardinalfish / ring-tailed cardinalfish (Apogon aureus) under a hard corail table (Acropora ), Daymaniyat islands, Oman. Gulf of Oman.

Pascal Kobeh / Honeycomb moray (Gymnothorax favagineus) out of its hole with golden cardinalfish / ring-tailed cardinalfish (Apogon aureus), Daymaniyat islands, Oman. Gulf of Oman.

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

Georgette Douwma / Tropical reef fish composite image on black background, Splendid soldierfish (Myripristis melanosticta), Pajama cardinalfish (Sphaeramia nematoptera), Golden puffer (Arothron meleagris), Banggai cardi...

Georgette Douwma / Yellow tropical reef fish composite image on black background, Falcula butterflyfish (Chaetodon falcula), Yellow boxfish (Ostracion cubicus), Golden butterflyfish (Chaetodon semilarvatus), Red Sea clo...