David Fleetham / Striped triplefin (Helcogramma striata) on hard coral, Tubataha Reef, Philippines.

Juergen Freund / Triplefin (Helcogramma sp) on a coral, Papua New Guinea.

Alex Mustard / Rhinoceros triplefin (Helcogramma rhinoceros) male displaying his dark mating colours and lifts his extended snout to impress a more drably coloured female as she lays eggs in their nest. Seraya, Tula...

Alex Mustard / Portrait of a striped triplefin (Helcogramma striatum) sitting on top of a coral. Menjangan Island, Bali, Indonesia. Java Sea

Franco Banfi / Blue lined blenny (Helcogramma striata) Tubbataha Reef Natural Park, UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Franco Banfi / Neon triplefin (Helcogramma striata) Tubbataha Reef Natural Park, UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Pascal Kobeh / Blackfin triplefin (Helcogramma fuscopinna), coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Blackfin triplefin (Helcogramma fuscopinna), coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Franco Banfi / Neon triplefin (Helcogramma striata) Maldives, Indian Ocean

Alex Mustard / A Symmetrical brain coral (Pseudodiploria strigosa) preparing to spawn at night, showing the bundles of eggs and sperm within the polyps prior to their synchronous release, with a Triplefin (Helcogram...

Georgette Douwma / Striped triplefin (Helcogramma striata) lying on Sea squirts (Atriolum robustum) Raja Ampat, West Papua, Indonesia

Alex Mustard / Triplefin (Enneanectes sp) between the polyps of a great star coral (Montastraea cavernosa) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.