Neil Aldridge / Nile crocodile (Crocodylus niloticus) snatching a Mozambique tilapia (Oreochromis mossambicus) in its jaws, Shingwedzi River, Kruger National Park, South Africa.

Claudio Contreras,Claudio Contreras / Black-axil Chromis (Chromis atripectoralis) blurred motion photograph. Bilang Bilangang Island, Danajon Bank, Central Visayas, Philippines, April

Brandon Cole / Finger Sponge (Raspailia topsenti) and Demoiselle (Chromis dispilus) fish swimming by, 13 feet deep. Poor Knights Islands Marine Reserve, New Zealand, Pacific Ocean.

Brandon Cole / Demoiselle fish (Chromis dispilus) swarm in front of kelp (Ecklonia radiata) Poor Knights Islands Marine Reserve, New Zealand, Pacific Ocean.

Jurgen Freund / Shoal of Blue chromis (Chromis viridis) amongst hard coral with Cloudy Damselfish (Dascyllus carneus) Sipadan, Malaysia.

Georgette Douwma / Bigscale soldierfish (Myripristis berndti), Sweetlips, Philippine chromis with Blueline snappers in background. Komodo National Park, Indonesia

Wild Wonders of Europe / Banfi / One of the deeper artificial reefs surraunded by Damselfish (Chromis chromis) with a Comber (Serranus cabrilla) in the middle, Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Wild Wonders of Europe / Banfi / Shoal of Mediterranean / Blue damselfish (Chromis chromis) Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Andy Murch / Brown stingray (Bathytoshia lata) on sea floor, Azores chromis (Chromis limbata) fish swimming above. Los Gigantes, Tenerife, Canary Islands. June.

Pascal Kobeh / Blue chromis (Chromis cyanea) with attached parasitic Isopod (Anilocra sp) female feeding on blood, in reef. Bahamas.

Pascal Kobeh / Blue chromis (Chromis cyanea) with parasitic Isopod (Anilocra sp) female feeding on blood. Male isopods invisible to naked eye, female excretes a chemical substance to maintain masculinity of small ma...

Alex Mustard / RF - Rich coral garden with hard corals (Montipora sp), Brain coral (Goniastrea sp, Lobophytum sp.) and lots of Lemon damsel (Pomacentrus moluccensis) and Ternate chromis fish (Chromis ternatenis). Ru...

Alex Mustard / Blue chromis (Chromis cyanea) damselfish with a large parasitic isopod attached below its eye. There is debate about whether these isopods should be considered parasites or merely hitch-hikers. Jardin...

Alex Mustard / Sunshinefish (Chromis insolata) living on a deep wall on a coral reef. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / Diver swimming over a coral reef with Staghorn coral (Acropora cervicornis) with Blue chromis (Chromis cyanea) and Spotted scorpionfish (Scorpaena plumieri). East End, Grand Cayman, Cayman Islands, Br...

Claudio Contreras / Blue Chromis (Chromis cyanea) with Cymothoid Isopod attached, Cienaga de Zapata National Park, Matanzas Province, Cuba.

Alex Mustard / Coral reef scene, with Philippines chromis (Chromis scotochiloptera), hard coral (Acropora sp.) and purple elephant ear sponges (Ianthella basta). Apo Island Marine Protected Area, Dumaguete, Negros,...

Dimitris Poursanidis / A school of Mediterranean chromis (Chromis chromis) swimming above Neptune seagrass (Posidonia oceanica) meadow, Skyros, North Aegean, Greece.

Fred Olivier / Wide angle shot of a coral reef, with Moorish idols?(Zanclus cornutus), Oval butterflyfish (Chaetodon lunulatus), Lemon damsels (Pomacentrus moluccensis) and Black and gold chromis (Neoglyphidodon nig...

Fred Olivier / Wide angle shot of a coral reef, with Moorish idols?(Zanclus cornutus), Oval butterflyfish (Chaetodon lunulatus), Lemon damsels (Pomacentrus moluccensis) and Black and gold chromis (Neoglyphidodon nig...

Fred Olivier / Green chromis (Chromis viridis) in coral bommie (Acropora), with occasional Blue damselfish (Pomacentridae), Nusatupe Lagoon, Solomon Islands.

Fred Olivier / Close-up of a Green chromis (Chromis viridis) and a Lemon damsel (Pomacentrus mollucensis) swimming near coral, Nusatupe Lagoon, Solomon Islands.

Pascal Kobeh / Bluegreen puller (Chromis viridis) and camouflaged Variegated lizardfish (Synodus variegatus) on sea floor, at night. Indian Ocean, Madagascar.

Pascal Kobeh / Azores chromis / Atlantic damselfish (Chromis limbata) Azores, Atlantic Ocean.

Pascal Kobeh / Azores chromis / Atlantic damselfish (Chromis limbata) Azores, Atlantic ocean.

Pascal Kobeh / Azores chromis or Atlantic damselfish (Chromis limbata) Azores, Atlantic ocean.

Georgette Douwma / Kaleidoscopic image of Blue-green chromis (Chromis atripectoralis) Coral reef landscape. Egypt, Red Sea.

Linda Pitkin / Coral reef with Anthias fish (Pseudanthias squamipinnis) and Twotone chromis (Chromis dimidiata) around Yellow scroll coral (Lettuce coral) (Turbinaria reniformis). With diver Jackson Reef, Straits...

Linda Pitkin / Coral reef with Anthias fish (Pseudanthias squamipinnis) and Twotone chromis (Chromis dimidiata) around Yellow scroll coral (Lettuce coral) (Turbinaria reniformis) Jackson Reef, Straits of Tiran, R...

Linda Pitkin / Azure vase sponge (Callyspongia plicifera) on coral reef, with small fish, Brown Chromis (Chromis multilineata) Bonaire, Leeward Antilles, Caribbean.

Claudio Contreras / Oval chromis (Chromis alta), San Benitos Islands, Baja California Pacific Islands Biosphere Reserve, Baja California, Mexico, May

Claudio Contreras / Blue-and-yellow chromis (Chromis limbaughi), Salsipuedes Island Protected Area, Gulf of California (Sea of Cortez), Mexico, July

Alex Mustard / Staghorn coral (Acropora cervicornis) growing on a coral reef and creating a home for Blue chromis (Chromis cyanea). East End, Grand Cayman, Cayman Islands. British West Indies. Caribbean Sea

Nature Production / School of Northern yellow-spotted Chromis (Chromis yamakawai) and young Clownfish (Amphiprion clarkii), Chichijima, Ogasawara Islands UNESCO World Heritage Site, Japan

Angelo Gandolfi / Schooling Damselfish (Chromis chromis) over Neptune grass (Posidonia oceanica) Western Mediterranean Sea, Ibiza UNESCO World Heritage Site, Spain

Tony Wu / Golden damselfish (Amblyglyphidodon aureus), Caroline Islands, Palau, Philippine Sea.

Tony Wu / Darkfin chromis (Chromis atripes) Eastern Fields of Papua New Guinea

Alex Mustard / Blacksmiths (Chromis punctipinnis) school swam through a giant kelp (Macrocystis pyrifera) forest, Santa Barbara Island, Channel Islands. Los Angeles, California, USA, North East Pacific Ocean.

Alex Mustard / Sunshinefish (Chromis insolata) juvenile on a deep reef wall, East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / School of Blacksmith fish (Chromis punctipinnis) swim through a giant kelp (Macrocystis pyrifera) forest. Santa Barbara Island, Channel Islands. Los Angeles, California, United States of America. Nort...

Alex Mustard / Chocolate-dip chromis (Chromis dimidiata) male over out of focus hard coral (Porites nodifera). Sha'ab Claudia, Fury Shoal, Egypt. Red Sea

Aflo / Damselfishes (Chromis) surrounding coral reef with Acropora corals, Kerama Islands, Okinawa, Japan.

Aflo / Jewel basslet (Pseudanthias squamipinnis) and Damselfishes (Chromis) surrounding coral reef with Acropora corals, Kerama Islands, Japan.

Aflo / Jewel basslet (Pseudanthias squamipinnis) shoal with and Damselfishes (Chromis) surrounding coral reef with Acropora corals, Kerama Islands, Japan.

Alex Mustard / School of Black-axil chromis (Chromis attripectoralis) swimming above branching corals (Acropora sp.) Buyat Bay, North Sulawesi, Indonesia. Molucca Sea.

Brandon Cole / Crescent-tail Bigeyes (Priacanthus hamrur), schooling Bluestreak fusiliers (Pterocaesio tile), and Chromis (Chromis sp.). Komodo National Park, Indonesia, tropical Pacific Ocean.

Jurgen Freund / RF- Acropora table and staghorn corals with Bluegreen chromis (Chromis viridis) shoal. Great Barrier Reef, Queensland, Australia. (This image may be licensed either as rights managed or royalty free.)

Pascal Kobeh / Kelp forest (Macrocystis pyrifera) with a school of Blacksmith fish (Chromis punctipinnis), a Garibaldi damselfish (Hypsypops rubicundus) and two California sheephead (Semicossyphus pulcher), Californ...