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...