Tony Wu / Twinspot snapper (Lutjanus bohar) shoal rushing up to spawn, releasing a cloud of milky white sperm and eggs in the water column. Caroline Islands, Palau, November.

Tony Wu / Twinspot snapper (Lutjanus bohar) engaged in a mass spawning aggregation early in the morning. Caroline Islands, Palau. April. Winner of Underwater category, Wildlife Photographer of the Year 2016.

Alex Mustard / Schoolmaster snapper (Lutjanus apodus) school, under a coral ledge, Snapper Hole, East End, Grand Cayman, Cayman Islands, Caribbean Sea.

Alex Mustard / Schoolmaster snapper (Lutjanus apodus) above a coral reef, Georgetown, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Juergen Freund / Midnight snapper (Macolor macularis) juvenile swimming towards the camera. Misool, Raja Ampat, West Papua, Indonesia

Jeff Rotman / Shark handler wearing chain mail suit feeding Caribbean Reef shark (Carcharhinus perezi) Bahamas, Caribbean Sea. Model release Model released.

Juergen Freund / A school of Bigeye Snapper {Lutjanus lutjanus} Indo-pacific

Juergen Freund / A school of Bigeye snapper {Lutjanus lutjanus} Indo-pacific

Georgette Douwma / Shoal of Bohar / Twinspot snapper {Lutjanus bohar} Ras Mohammed, Red Sea, Egypt

Jeff Rotman / Caribbean reef shark {Carcharhinus perezi} and Yellowtail snapper fish (Ocyurus chrysurus) Bahamas

Alex Mustard / Reef manta (Mobula alfredi) visiting a cleaning station on a coral reef with a school of Onespot snappers (Lutjanus monostigma), Oriental sweetlips (Plectorhinchus vittatus) and Sabre squirrelfish (Sa...

Shane Gross / Caribbean reef shark (Carcharhinus perezi) patrolling coral reef with Schoolmaster snapper (Lutjanus apodus) and other fish. Caribbean Sea off Gardens of the Queen National Park, Cuba.

David Fleetham / Adult Two-spot Red Snapper (Lutjanus bohar) among other reef fish. Bequ Lagoon, Fiji.

David Fleetham / Schooling Black Striped Salema / Snapper (Xenocys jessiae) and Yellowtail Surgeonfish (Prionurus laticlavius). Galapagos Islands, Equador. Three images were stitched to create this panorama.

David Fleetham / School of Black Striped Salema / Snapper (Xenocys jessiae) form a massive spinning ball. Galapagos Islands, Equador.

David Fleetham / Diver above an opening in a school of Brown striped snapper (Xenocys jessiae). Galapagos Islands, Ecuador.

David Fleetham / Diver above a chimney like opening in a school of Brown striped snapper (Xenocys jessiae). Galapagos Islands, Ecuador.

David Fleetham / Galapagos shark (Carcharhinus galapagensis) swimming through a school of Black striped salema (Xenocys jessiae). Galapagos Islands, Equador.

David Fleetham / Motion blurred image of school of Brown striped snapper (Xenocys jessiae). Galapagos Islands, Ecuador.

David Fleetham / Dense school of Brown striped snapper (Xenocys jessiae), Galapagos Islands, Ecuador.

David Fleetham / Schooling Bluelined snapper (Lutjanus kasmira),Hawaii.

David Fleetham / Cubera snapper (Lutjanus cyanopterus) with Goby (Gobius sp) in its mouth that is looking for parasites. Bonaire, Netherlands Antilles, Caribbean.

David Fleetham / Cubera snapper (Lutjanus cyanopterus), Bonaire, Netherlands Antilles, Caribbean.

David Fleetham / Blacktail snapper (Lutjanus fulvus), Hawaii.

David Fleetham / Blue footed booby (Sula nebouxii excisa) diving into school of Brown striped snappers (Xenocys jessiae) Galapagos Islands, Ecuador.

David Fleetham / Diver / photographer amongst shoal of Black striped salema (Xenocys jassiae), Galapagos Islands, Equador. Model released.

David Fleetham / Shoal of Bluelined / Bluestriped snapper (Lutjanus kasmira) passing a diver working on a large wave-energy buoy off Kaneoho Bay, Oahu. The 40-kW experimental buoy employs the bobbing motion of the buo...

David Fleetham / Diver and schooling bluelined / blue striped snapper (Lutjanus kasmira) on the wreck of the "Sea Tiger" off Waikiki, Oahu, Hawaii. Model released

David Fleetham / Schoolmaster snapper (Lutjanus apodus) on coral reef. Bonaire, Netherlands Antilles, Caribbean.

David Fleetham / Bluelined snapper (Lutjanus kasmira) shoal, Hawaii.

Alex Mustard / Bohar snapper (Lutjanus bohar) school at Ras Mohammed, Shark Reef, Ras Mohammed, Sinai, Egypt. Red Sea.

Pascal Kobeh / Red snappers / Two-spot red snappers (Lutjanus bohar) mass shoal of fish spawning, Palau, Philippine Sea. A few black and white snappers (Macolor niger) have crawled into the school to eat the eggs.

Alex Mustard / Bohar snappers (Lutjanus bohar) breaking up into smaller groups to spawn. The fish swim short arches above the main group as they release clouds of gametes. Shark City, Ulong, Rock Islands, Palau. T...

Pascal Kobeh / School of Bluelined / Bluestriped snappers (Lutjanus kasmira) Palau. Philippine Sea.

Pascal Kobeh / Mexican goatfish (Mulloidichthys dentatus) and Blue-and-gold snappers (Lutjanus viridis) in a feeding frenzy over Triggerfish eggs, Baja California peninsula, Mexico. Sea of Cortez.

Michael Pitts / Close up of a shoal of Bluestripe snapper (Lutjanus kasmira) moving over a reef, Maldives, Indian Ocean.

Michael Pitts / Close up of a shoal of Bluestripe snapper (Lutjanus kasmira) moving over a reef, Maldives, Indian Ocean.

Michael Pitts / Shoal of Bluestripe snapper (Lutjanus kasmira) moving over a reef, Maldives, Indian Ocean.

Franco Banfi / Sailfin snapper (Symphorichthys spilurus) Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Michael Pitts / Bluelined snapper (Lutjanus coeruleolineatus) Red Sea.

Juergen Freund / Schooling Two-Spot snapper (Lutjanus biguttatus) in the reef, Raja Ampat, West Papua, Indonesia

Juergen Freund / A school of Bigeye snapper {Lutjanus lutjanus}, mixed with Yellowfin goatfish (Mulloidchthys vanicolensis) Great Barrier Reef, Australia

Juergen Freund / Shoal of Blueline snappers (Lutjanus kasmira) mixed with bigeye snappers, (Lutjanus lutjanus) Great Barrier Reef, Australia

Franco Banfi / Shoal of Humpback red snapper (Lutjanus gibbus) Maldives, Indian Ocean

Franco Banfi / Shoal of Five-line snapper (Lutjanus quinquelineatus) Maldives, Indian Ocean

Franco Banfi / Shoal of Five-line snapper (Lutjanus quinquelineatus) Maldives, Indian Ocean

Franco Banfi / Scuba diver with shoal of Five-line snapper (Lutjanus quinquelineatus) Maldives, Indian Ocean, November

Franco Banfi / Shoal of Five-line snapper (Lutjanus quinquelineatus) Maldives, Indian Ocean

Franco Banfi / Shoal of Five-line snapper (Lutjanus quinquelineatus) Maldives, Indian Ocean

Franco Banfi / Shoal of Five-line snapper (Lutjanus quinquelineatus) Maldives, Indian Ocean

Franco Banfi / Shoal of Five-line snapper (Lutjanus quinquelineatus) Maldives, Indian Ocean

Michele Westmorland / Humpback snapper (Lutjanus gibbus) portrait, Palau, Micronesia.

Georgette Douwma / Humpback or Paddletail snappers (Lutjanus gibbus), large school, Maldives, Indian Ocean

Georgette Douwma / Blueline snappers (Lutjanus kasmira) school with an underwater photographer taking a picture. Maldives, Indian Ocean, 2012

Shibai Xiao / Mangrove red snapper (Lutjanus Argentimaculatus) captrive underwater with two fisherman on bank looking down into water, Hainan Island, South China Sea, China. No release available.

Alex Mustard / Mutton snapper (Lutjanus analis) portrait, hovering above a coral reef, Georgetown, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Schoolmaster snapper (Lutjanus apodus) resting beneath an overhang, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Pete Oxford / Yellowtail snapper (Ocyurus chrysurus) Jardines de la Reina National Park Cuba, Caribbean

Pete Oxford / Dog Snapper (Lutjanus jocu) Coral Reef Island, Belize Barrier Reef, Belize

Pete Oxford / Caught Red Snapper (Lutjanus campechanus). Mahahual Dock, Mahahual, South Yucatan Peninsula, Mexico.

Juergen Freund / Midnight snapper (Macolor macularis) West New Britain, Papua New Guinea.

Juergen Freund / Schooling Pinjalo snapper (Pinjalo lewisi) West New Britain, Papua New Guinea.

Juergen Freund / Midnight snapper (Macolor macularis) Bali, Indonesia.

Juergen Freund / Bigeye Snapper school (Lutjanus lutjanus) swimming above the reef. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Juvenile red emperor snapper (Lutjanus sebae), swimming among sea urchins. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Schooling Bigeye snappers (Lutjanus lutjanus) Philippines.

Juergen Freund / Snapper (Lutjanidae) over coral reef, Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / Midnight snapper juvenile (Macolor macularis) swimming above reef coral. Misool, Raja Ampat, West Papua, Indonesia

Georgette Douwma / Black-spot / Dory Snappers (Lutjanus fulviflamma) over coral reef. Rinca, Komodo National Park, Indonesia, December.

Georgette Douwma / Blueline Snappers (Lutjanus kasmira) school over coral reef. Rinca, Komodo National Park, Indonesia, December.

Tim Laman / At sea off the Fak Fak Peninsula, a fisherman in a canoe caught a variety of fish including tuna, snappers, and groupers on a hand line. This is a good example of a healthy fishery. West Papua, Indone...

Tim Laman / At sea off the Fak Fak Peninsula, a fisherman in a canoe caught a variety of fish including tuna, snappers, and groupers on a hand line. This is a good example of a healthy fishery. West Papua, Indone...

Tim Laman / At sea off the Fak Fak Peninsula, a lone fisherman in a canoe has caught a variety of fish including jacks, snappers, and groupers. Visible below the water, is a net holding a grouper he is keeping a...

Georgette Douwma / Blueline snappers (Lutjanus kasmira) hunting over coral reef. Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Blueline snappers (Lutjanus kasmira) school. Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Blueline snappers (Lutjanus kasmira) on coral reef with soft corals. Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Blueline snapper (Lutjanus kasmira) with Bigscale soldierfish (Myripristis berndti) in background, Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Shoal of Blueline snappers (Lutjanus kasmira) Rinca, Komodo National Park, Indonesia

Georgette Douwma / Blueline snapper (Lutjanus kasmira) with Bigscale soldierfish (Myripristis berndti). Rinca, Komodo National Park, Indonesia

GEORGETTE DOUWMA / Two-spot snapper (Lutjanus biguttatus) with soft corals. Andaman Sea, Thailand.

Georgette Douwma / One-spot snapper (Lutjanus monostigma). Rinca, Komodo National Park, Indonesia

Georgette Douwma / Mangrove jack / red snapper (Lutjanus argentimaculatus) swimming along coral wall with soft corals and crinoids, Rinca, Indonesia

GEORGETTE DOUWMA / Midnight / Black-and-white snapper (Lutjanus / Malacor macularis) on wreck. Bali, Indonesia

GEORGETTE DOUWMA / Mixed school of Bigeye snappers (Lutjanus lutjanus) and Blueline snappers (Lutjanus kasmira). Andaman Sea, Thailand

GEORGETTE DOUWMA / Shoal of Bigeye snappers (Lutjanus lutjanus) Andaman Sea, Thailand.

GEORGETTE DOUWMA / Shoal of Two-spot snapper (Lutjanus biguttatus) over schooling over Staghorn coral. Andaman Sea, Thailand

GEORGETTE DOUWMA / Two-spot snapper (Lutjanus biguttatus) school over vast beds of Staghorn coral. Andaman Sea, Thailand

GEORGETTE DOUWMA / Shoal of Bigeye snappers (Lutjanus lutjanus) Andaman Sea, Thailand

GEORGETTE DOUWMA / Brown-striped red snapper (Lutjanus vitta) with soft corals. Andaman Sea, Thailand.

Tim Laman / Snappers {Lutjanidae}, sponges, tunicates and other invertebrates amongst the roots of Red Mangrove trees {Rhizophora mangle} in the Belize Cays, Tunicate Cove, Belize.

Tim Laman / Snappers {Lutjanidae} amongst the roots of Red Mangrove trees {Rhizophora mangle} in the Belize Cays, Tunicate Cove, Belize.

Tim Laman / Snappers {Lutjanidae} find shelter among the roots of Red mangrove {Rhizophora mangle} Tunicate Cove, Belize.

Tim Laman / Underwater view of Red mangrove (Rhizophora sp.) roots with algae growing on roots with juvenile Snappers sheltering among roots. Stafford Creek, Andros Island, Bahamas.

Tim Laman / Underwater view of Red mangrove (Rhizophora sp.) roots with algae growing on roots with juvenile Snappers sheltering among roots. Stafford Creek, Andros Island, Bahamas.

GEORGETTE DOUWMA / Red emperor fish / snapper (Lutjanus sebae) feeding on a Grey bonnet (Phalium glaucum). Lembeh Strait, North Sulawesi, Indonesia.