Jordi Chias / Schoolmaster snapper (Lutjanus apodus) school in the reef, Little Cayman island, Cayman Islands, Caribbean.

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.

Shane Gross / Schoolmaster snapper (Lutjanus apodus) shoal sheltering amongst Red mangrove (Rhizophora mangle) roots. Caribbean Sea off Gardens of the Queen National Park, Cuba.

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.

Shane Gross / Schoolmaster snapper (Lutjanus apodus) in red mangrove(Rhizophora mangle) and turtlegrass (thalassia testudinum) habitats, Eleuthera Island, Bahamas.

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

Alex Mustard / Schoolmaster snapper (Lutjanus apodus) on coral reef. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Linda Pitkin / Schoolmaster snapper (Lutjanus apodus) on coral reef Bonaire, Leeward Antilles, Caribbean.

Linda Pitkin / Schoolmaster snapper (Lutjanus apodus) on coral reef Bonaire, Leeward Antilles, Caribbean.

Claudio Contreras / Elkhorn coral (Acropora palmata) French Grunt (Haemulon flavolineatum) and Schoolmaster Snapper (Lutjanus apodus), Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Av...

Alex Mustard / Schoolmaster snapper (Lutjanus apodus) hunts silversides (Atherinidae) inside a coral cavern. George Town, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Pete Oxford / Schoolmaster fish (Lutjanus apodus) Halfmoon Caye, Lighthouse Reef Atoll, Belize.

Pete Oxford / Painted Sweetlips (Haemulon sciurus), French Grunt (Haemulon flavolineatum), and Schoolmaster (Lutjanus apodus) school circling Elkhorn Coral (Acropora palmata), Hol Chan Marine Reserve, Belize

Georgette Douwma / Schoolmaster fish (Lutjanus apodus) with soft corals. Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Schoolmaster fish (Lutjanus apodus) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Schoolmaster fish (Lutjanus apodus) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Pascal Kobeh / Two Bluestriped / Boar grunts (Haemulon sciurus) and a Schoolmaster / Dogtooth snapper (Lutjanus apodus) in front of a Sea rod (Plexaura / Eunicea ), San Salvador Island / Colombus Island, Bahamas. Ca...

Pascal Kobeh / Bluestriped / boar grunt (Haemulon sciurus) and Schoolmaster / Dogtooth snapper (Lutjanus apodus) in front of a sea rod / gorgonian (Plexaura / Eunicea ), San Salvador Island / Colombus Island, Bahama...

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

Pete Oxford / Schoolmaster (Lutjanus apodus), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Schoolmaster (Lutjanus apodus), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Schoolmaster (Lutjanus apodus) school over reef, Jardines de la Reina National Park, Cuba

Pete Oxford / Schoolmaster (Lutjanus apodus), Xcalak National Reef Park, Mahahual, Quintana Roo, Mexico

Pete Oxford / Red Mangrove (Rhizophora mangle) roots provide nursery for Schoolmaster (Lutjanus apodus) young, Sian Ka'an Biosphere Reserve, Quintana Roo, Mexico

Doug Perrine / Schoolmaster snapper (Lutjanus apodus) hovering over Giant barrel sponge (Xestospongia muta) Lighthouse Reef Atoll, Caribbean Sea, Belize

GEORGETTE DOUWMA / Schoolmaster (Lutjanus apodus) fish on coral reef. Netherlands Antilles, Caribbean, Atlantic Ocean.

Peter Scoones / Schoolmaster {Lutjanus apodus) Caribbean photographed during making of BBC Planet Earth series 2005

Peter Scoones / Schoolmaster {Lutjanus apodus) Caribbean photographed during making of BBC Planet Earth series 2005

Peter Scoones / Schoolmaster {Lutjanus apodus) Caribbean photographed during making of BBC Planet Earth series 2005

Doug Perrine / Schoolmaster fish {Lutjanus apodus} Cayman Brac, Cayman Islands, Caribbean

Doug Perrine / Schoolmaster snappers {Lutjans apodus} on coral reef, Cayman Islands, Caribbean

GEORGETTE DOUWMA / Schoolmaster {Lutjanus apodus} Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Pete Oxford / Painted Sweetlips (Haemulon sciurus), French Grunt (Haemulon flavolineatum), and Schoolmaster (Lutjanus apodus) school circling Elkhorn Coral (Acropora palmata), Hol Chan Marine Reserve, Belize

Pete Oxford / Painted Sweetlips (Haemulon sciurus), French Grunt (Haemulon flavolineatum), and Schoolmaster (Lutjanus apodus) school circling Elkhorn Coral (Acropora palmata), Hol Chan Marine Reserve, Belize

Pete Oxford / Schoolmaster (Lutjanus apodus), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Schoolmaster (Lutjanus apodus), Bonaire, Netherlands Antilles, Caribbean

Alex Mustard / Schoolmaster snapper (Lutjanus apodus) portrait, Grand Cayman, Cayman Islands, Caribbean Sea.

Franco Banfi / Schoolmaster snapper (Lutjanus apodus) shoal swimming through a shoal of Sardines (Sardina sp.), Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.

Franco Banfi / Schoolmaster snapper (Lutjanus apodus) shoal swimming beneath a shoal of Sardines (Sardina sp.), Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.

Pascal Kobeh / Schoolmasters or Dogtooth snappers (Lutjanus apodus) on the reef, The Gardens of the Queen, Cuba, Caribbean Sea.

Claudio Contreras / Schoolmaster snapper (Lutjanus apodus), Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico, May

Alex Mustard / Mixed school of Bluestriped grunts (Haemulon sciurus), French grunts (Haemulon flavolineatum) and Schoolmasters ( Lutjanus apodus) shelter in Elkhorn corals (Acropora palmata) growing in shallow water...

Shane Gross / Schoolmaster snapper (Lutjanus apodus) amongst Red mangrove (Rhizophora mangle), Turtlegrass (Thalassia testudinum) in foreground. Eleuthera Island, Bahamas.

Shane Gross / Schoolmaster snapper (Lutjanus apodus) swimming amongst Red mangrove (Rhizophora mangle), Turtlegrass (thalassia testudinum) in foreground. Eleuthera Island, Bahamas.

Alex Mustard / School of bluestriped grunt (Haemulon sciurus), Schoolmaster snapper (Lutjanus apodus) and Porkfish (Anisotremus virginicus) sheltering beneath the branches of the critically endangered Elkhorn coral...

Alex Mustard / Sunbeams play through the roots of red mangrove trees (Rhizophora sp.), encrusted with marine life and home to schoolmaster snappers (Lutjanus apodus). Jardines de la Reina, Gardens of the Queen Natio...

Alex Mustard / Sunbeams play through the roots of red mangrove trees (Rhizophora sp.), encrusted with marine life and home to schoolmaster snappers (Lutjanus apodus). Jardines de la Reina, Gardens of the Queen Natio...

Claudio Contreras / Schoolmaster snapper (Lutjanus apodus) and Bluestriped grunt (Haemulon sciurus) seeking protection in Elkhorn Coral (Acropora palmata), Jardines de la Reina / Gardens of the Queen National Park, Carib...

Claudio Contreras / Schoolmaster snapper (Lutjanus apodus) and Bluestriped grunt (Haemulon sciurus) amongst Red mangrove (Rhizophora mangle), Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Cieg...