Pete Oxford / Butterfly peacock bass (Cichla ocellaris) in permanent freshwater pond, savannah, Rupununi, Guyana

Michel Roggo / Butterfly peacock bass (Cichla ocellaris) in flooded forest, Rio Tabajos, Amazon, Brazil.

Fred Bavendam / Butterfly Perch (Caesioperca lepidoptera) group swimming around two sponges, Tasmania, Australia

Fred Bavendam / Collared Butterflyfish (Chaetodon collare) school, Andaman Sea, Thailand

Fred Bavendam / Eyepatch Butterflyfish (Chaetodon adiergastos) school swimming along shallow reef, Bali, Indonesia

Fred Bavendam / Butterfly Perch (Caesioperca lepidoptera) swimming amidst Gorgonian Sea Whips, fans and various kinds of sponges at 40 meters depth, Tasman Peninsula, Tasmania, Australia

Fred Bavendam / Butterfly Perch (Caesioperca lepidoptera) and diver swimming amidst Gorgonian Sea Whips, Fans and various kinds of Sponges at 40 meters depth, Tasman Peninsula, Tasmania, Australia

Georgette Douwma / Yellowheaded butterflyfish (Chaetodon xanthocephalus) Maldives, Indian Ocean

Georgette Douwma / Yellowheaded butterflyfish (Chaetodon xanthocephalus) Maldives, Indian Ocean

Pete Oxford / Foureye Butterflyfish (Chaetodon capistratus) juvenile, Belize Barrier Reef, Belize

Pete Oxford / Butterfly peacock bass (Cichla ocellaris) protecting young fry in freshwater pond, Karanambu, Rupununi, Guyana

Aflo / ic-08203 Shoal of Lemon butterflyfish {Chaetodon miliaris} Hawaii, USA.

Fred Bavendam / Gunther's Butterflyfish (Chaetodon guentheri), Komodo Island, Indonesia

Fred Bavendam / Chevron Butterflyfish (Chaetodon trifascialis) showing nocturnal coloration, Bali, Indonesia

Fred Bavendam / Bennett's Butterflyfish (Chaetodon bennetti) feeding on black coral, Bali, Indonesia

Fred Bavendam / Dot-and-dash Butterflyfish (Chaetodon pelewensis), Coral Sea, Australia

Fred Bavendam / Dot-and-dash Butterflyfish (Chaetodon pelewensis), Tonga

Fred Bavendam / Meyer's Butterflyfish (Chaetodon meyeri), Manado, Indonesia

Fred Bavendam / Pacific Pinstriped Butterflyfish (Chaetodon lunulatus) showing nocturnal coloration, North Sulawesi, Indonesia

Fred Bavendam / Blackblotch Butterflyfish (Chaetodon ephippium), Bali, Indonesia

Fred Bavendam / Black-backed Butterflyfish (Chaetodon melannotus), Bali, Indonesia

Fred Bavendam / Cross-stripe Butterflyfish (Chaetodon auriga) showing nocturnal coloration, Bali, Indonesia

Fred Bavendam / Vagabond Butterflyfish (Chaetodon vagabundus), Bali, Indonesia

Fred Bavendam / Vagabond Butterflyfish (Chaetodon vagabundus) showing nocturnal coloration, Manado, Indonesia

Fred Bavendam / Klein's Butterflyfish (Chaetodon kleinii) group feeding on polyps of soft coral, Ambon, Indonesia

Fred Bavendam / Collared Butterflyfish (Chaetodon collare) against sea fan, Andaman Sea, Thailand

Fred Bavendam / Chevron Butterflyfish (Chaetodon trifascialis), Bali, Indonesia

Fred Bavendam / Butterfly Perch (Caesioperca lepidoptera) school, Tasmania, Australia

Fred Bavendam / Klein's Butterflyfish (Chaetodon kleinii), Manado, Sulawesi, Indonesia

Jeff Rotman / Diver surrounded by Lemon Butterflyfish (Chaetodon millaris). Hawaii, Pacific Ocean.

Juergen Freund / Weedy seadragon (phyllopteryx taeniolatus) male with eggs swimming past a banded butterfly fish. Albany, Western Australia

Norbert Wu / Eight-banded Butterflyfish (Chaetodon octofasciatus), Raja Ampat Islands, Indonesia

Doug Perrine / Yellowheaded butterflyfish {Chaetodon xanthocephalus} Helengeli, Maldives

Doug Perrine / Butterfly / Diamond ray {Gymnura natalensis} camouflaged on seabed, captive, from Southern Africa

Flip de Nooyer / Grayling (Hipparchia semele) butterfly on purple flower, Europe

Chris Newbert / Grouper (Cephalopholis sp) and Red Sea Bannerfish (Heniochus intermedius), Red Sea, Egypt

Chris Newbert / Masked Butterflyfish (Chaetodon semilarvatus) 30 feet deep, Red Sea, Egypt

Chris Newbert / Diagonal Butterflyfish (Chaetodon fasciatus) 50 feet deep, Solomon Islands

Norbert Wu / Longnose Butterflyfish (Forcipiger flavissimus) long nose helps it feed in crevices, Hawaii

Norbert Wu / Masked Butterflyfish (Chaetodon semilarvatus) school and Butterflyfish (Heniochus diphreutes), Red Sea, Egypt

Norbert Wu / Masked Butterflyfish (Chaetodon semilarvatus) endemic to Red Sea, Egypt

Norbert Wu / Lemon Butterflyfish (Chaetodon citrinellus) and Black Durgon (Melichthys niger) schooling, Hawaii

Norbert Wu / Ornate Butterflyfish (Chaetodon ornatissimus) two swimming underwater, Hawaii

Fred Bavendam / Ornate Butterflyfish (Chaetodon ornatissimus) at night exhibiting its nocturnal coloration pattern, Manado, North Sulawesi, Indonesia

Fred Bavendam / Latticed Butterflyfish (Chaetodon rafflesi) portrait, Bali, Indonesia

Fred Bavendam / Klein's Butterflyfish (Chaetodon kleinii) resting in a Sponge at night showing nocturnal coloration, Manado, North Sulawesi, Indonesia

Norbert Wu / Pacific Double-saddle Butterflyfish (Chaetodon ulietensis) school with snorkeler, Bora Bora, French Polynesia

Fred Bavendam / Collared Butterflyfish (Chaetodon collare) school, Andaman Sea, Thailand

Fred Bavendam / Raccoon Butterflyfish (Chaetodon lunula) underwater portrait, Bali, Indonesia

Fred Bavendam / Eyepatch Butterflyfish (Chaetodon adiergastos) lining up for the services of a Blue-streaked Cleaner Wrasse (Labroides dimidiatus), Bali, Indonesia

Fred Bavendam / Butterfly Perch (Caesioperca lepidoptera) swarming around two Sponges riddled with Golden Zoanthids, Tasman Peninsula, Australia

Fred Bavendam / Butterfly Perch (Caesioperca lepidoptera) swimming in an invertebrate community including Sponges, Gorgonians and Golden Zoanthids at 35 meters depth, Bicheno, Tasmania, Australia

Fred Bavendam / Triangular Butterflyfish (Chaetodon baronessa) underwater portrait, Bali, Indonesia

Fred Bavendam / Ornate Butterflyfish (Chaetodon ornatissimus), Manado, North Sulawesi, Indonesia

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

Dan Burton / Two Common butterfly fish (Chaetodon chrysurus) Red Sea, Egypt

Constantinos Petrinos / Golden butterfly fish {Chaetodon fasciatus} Red Sea

Jeff Rotman / Striped butterflyfish {Chaetodon fasciatus} Red Sea

GEORGETTE DOUWMA / Golden / Masked butterfly fish with bannerfish shoal. Digitally manipulated image

Pete Oxford / Foureye Butterflyfish (Chaetodon capistratus), Bonaire, Netherlands Antilles, Caribbean

Angelo Giampiccolo / Banded butterfly fish (Chaetodon striatus), Belize Cayos, Caribbean.

Fred Bavendam / Collared Butterflyfish (Chaetodon collare) portrait, Andaman Sea, Thailand

Dan Burton / Crown butterfly fish, Red Sea (Chaetodon paucifasciatus)

GEORGETTE DOUWMA / Collared butterfly fish with fan coral (Chaetodon collare) Thailand, Andaman Sea.