Georgette Douwma / Longnose butterflyfish (Forcipiger longirostris). Andaman Sea, Thailand.

Fred Bavendam / Longnose Butterflyfish (Forcipiger longirostris) underwater, side view, Manado, North Sulawesi, Indonesia

Gary Bell/ Oceanwide / Longnose Butterflyfish (Forcipiger longirostris), Great Barrier Reef, Australia

Doug Perrine / Big longnose butterflyfish (Forcipiger longirostris) pair, one displaying rare, half-dark colour phase, feeding among corals on reef, Honokohau, North Kona, Hawaii, Pacific Ocean.

Doug Perrine / Big longnose butterflyfish (Forcipiger longirostris) displaying rare, half-dark color phase, swimming over Finger coral ( Porites compressa), North Kona, Hawaii, Pacific Ocean.

Doug Perrine / Big longnose butterflyfish (Forcipiger longirostris) displaying rare, dark colour phase, portrait, Kona, Hawaii, Pacific Ocean.

Doug Perrine / Two Big longnose butterflyfish (Forcipiger longirostris) hunting for prey hidden within the branches of an Antler coral (Pocillopora grandis), North Kona, Hawaii, Pacific Ocean.

Doug Perrine / Big longnose butterflyfish (Forcipiger longirostris) swimming over coral reef, South Kona, Hawaii, Pacific Ocean