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.

Juergen Freund / Striped triplefin (Helcogramma striatum) resting on its fins. North Raja Ampat, West Papua, Indonesia.

Juergen Freund / Tropical striped triplefin (Helcogramma striatum) on coral reef, Bali, Indo-pacific.

Tim Laman / Striped triplefin (Helcogramma striatum) resting on sponge on coral reef, Bali, Indonesia.

Tim Laman / Striped Triplefin (Helcogramma striata) resting on pink sponge, Malapascua Island, Visayan Sea, Philippines

Juergen Freund / Striped triplefin fish {Helcogramma striata} on hard coral, Great Barrier Reef, Australia

Chris Newbert / Triplefin (Helcogramma sp) on Sea Fan (Muricella sp) 80 feet deep, Solomon Islands

Chris Newbert / Red-finned Triplefin (Helcogramma gymnauchen) portrait, 30 feet deep, Solomon Islands

Juergen Freund / Striped Triplefin (Helcogramma striata) on basketstar. Indo-Pacific

Juergen Freund / Triplefin fish {Helcogramma sp} on Basketstar, Sulu-Sulawesi seas, Indo-pacific

David Fleetham / Striped triplefin (Helcogramma striata) on tubastraea coral, Indonesia.

GEORGETTE DOUWMA / Bigmouth triplefin {Helcogramma sp} on soft coral, Banda Island, Moluccas, Indonesia

Alex Mustard / Striped triplefin (Helcogramma striatum) resting on the underside of a bleached Leather coral (Sarcophyton sp.). The bleaching occurred as a result of elevated water temperatures in late 2022, due to...

Alex Mustard / RF - Striped triplefin (Helcogramma striata) resting on Pink sponge (Chalinula sp.), Raja Ampat, West Papua, Ceram Sea, Pacific Ocean. (This image may be licensed either as rights managed or royalty f...

Alex Mustard / Maldives triplefin (Helcogramma maldivensis) resting on a yellow / green sponge, South Ari Atoll, Maldives, Indian Ocean.

Magnus Lundgren / Striped triplefin (Helcogramma striatum), portrait, Raja Ampat, West Papua, Indonesia, Pacific Ocean.

Magnus Lundgren / Striped triplefin (Helcogramma striatum), close up, Raja Ampat, West Papua, Indonesia, Pacific Ocean.

Georgette Douwma / Tropical striped triplefin (Helcogramma striatum) on Pink sea squirts (Didemnidae). Derawan Islands, East Kalimantan, Indonesia.