Alex Mustard / American crocodile (Crocodylus acutus) shows off its teeth. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Claudio Contreras / American crocodile (Crocodylus acutus), Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba.

Shane Gross / American crocodile (Crocodylus acutus) with open mouth amongst Seagrass (Alismatales). Gardens of the Queen National Park, Cuba.

Claudio Contreras / American crocodile (Crocodylus acutus), underwater, Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba, January. Vulnerable species.

Jen Guyton / American crocodiles (Crocodylus acutus) in the Rio Tarcoles, Costa Rica.

Jen Guyton / American crocodiles (Crocodylus acutus) in the Rio Tarcoles, Costa Rica.

Alex Mustard / American crocodile (Crocodylus acutus) reflected in the surface as it floats, Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Claudio Contreras / American crocodile (Crocodylus acutus) rear view of animal swimming away over seagrass bed, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico

Claudio Contreras / American crocodile (Crocodylus acutus) exhaling bubbles underwater, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico, May.

Claudio Contreras / American crocodile (Crocodylus acutus) split level with animal resting at surface in shallow water over seagrass bed, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico

Claudio Contreras / American crocodile (Crocodylus acutus) rear view of animal resting in shallow water, close up of tail, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico

Claudio Contreras / American crocodile (Crocodylus acutus) resting just above seagrass underwater, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico

Claudio Contreras / American crocodile (Crocodylus acutus) extreme close up with jaws open, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico

Ingo Arndt / American Crocodile (Crocodylus acutus) swimming in open ocean, Pacific Coast, Ostional, Costa Rica

Roland Seitre / American Crocodile (Crocodylus acutus) seen on 'The Crocodile Man Tour'. Carara National Park, Tarcoles, Costa Rica, August 2008.

Doug Perrine / American alligator (Alligator mississippiensis) with mouth open, split level, Big Cypress National Preserve, Florida Everglades, USA

Edwin Giesbers / American Crocodile (Crocodylus acutus) close-up of mouth and teeth, Costa Rica

Mike Wilkes / Head portrait of American crocodile {Crocodylus acutus} Florida, USA

Doug Wechsler / American crocodile with mouth open {Crocodylus acutus} Everglades NP, Florida, USA

Lynn M Stone / American crocodile in river (Crocodylus acutus) Florida, USA

Pete Oxford / American Crocodile (Crocodylus acutus) nest excavated by nesting female Green Iguana (Iguana iguana), Banco Chinchorro, Yucatan Peninsula, Mexico

Shane Gross / American crocodile (Crocodylus acutus) in seagrass bed. Jardines de la Reina / Gardens of the Queen National Park, Cuba.

Shane Gross / American crocodile (Crocodylus acutus) in seagrass bed. Jardines de la Reina / Gardens of the Queen National Park, Cuba.

Alex Mustard / RF - American crocodile (Crocodylus acutus) swims through sunrays. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea. (This image may be licensed either as rights managed o...

Alex Mustard / Snorkeller photographs an American crocodile (Crocodylus acutus) above a bed of seagrass (Thalassia testudinum). Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Alex Mustard / Split level photo of an American crocodile (Crocodylus acutus) beneath red mangrove trees (Rhizophora mangle) above a bed of seagrass ( Thalassia testudinum). Jardines de la Reina, Gardens of the Quee...

Alex Mustard / Split level photo of an American crocodile (Crocodylus acutus) beneath red mangrove trees (Rhizophora mangle) above a bed of seagrass (turtlegrass: Thalassia testudinum). Jardines de la Reina, Gardens...

Alex Mustard / RF - American crocodile (Crocodylus acutus) swimming through sunrays, above a bed of seagrass ( Thalassia testudinum). Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea. (T...

David Pattyn / American crocodile (Crocodylus acutus) in the Rio Tarcoles, Costa Rica

David Pattyn / American crocodile (Crocodylus acutus) resting at the edge of the Rio Tarcoles, Costa Rica

David Pattyn / American crocodile (Crocodylus acutus) in the Rio Tarcoles, Costa Rica

David Pattyn / American crocodile (Crocodylus acutus) attracted with bait as a tourist attraction in the Rio Tarcoles, Costa Rica

David Pattyn / American crocodile (Crocodylus acutus) portrait in the Rio Tarcoles, Costa Rica

David Pattyn / American crocodile (Crocodylus acutus) attracted with bait as a tourist attraction in the Rio Tarcoles, Costa Rica

David Pattyn / American crocodile (Crocodylus acutus) close up portrait in the Rio Tarcoles, Costa Rica

David Pattyn / American crocodile (Crocodylus acutus) close-up at the edge of the Rio Tarcoles, Costa Rica

David Pattyn / American crocodile (Crocodylus acutus) at the edge of the Rio Tarcoles resting in the sand Tarcoles, Costa Rica

David Pattyn / American crocodile (Crocodylus acutus) at the edge of the Rio Tarcoles resting in the sand Tarcoles, Costa Rica

Pascal Kobeh / Two tourists and their guides swimming near an American crocodile (Crocodylus acutus) Yucatan, Mexico

Shane Gross / American crocodile (Crocodylus acutus) in coastal waters. Caribbean Sea off Gardens of the Queen National Park, Cuba.

Shane Gross / American crocodile (Crocodylus acutus) with open mouth in Seagrass (Alismatales) meadow, reflected on water surface. Gardens of the Queen National Park, Cuba.

Franco Banfi / American crocodile over seagrass bed surfacing, (Crocodylus acutus), Chinchorro Banks (Biosphere Reserve), Quintana Roo, Mexico

Franco Banfi / American crocodile over seagrass bed (Crocodylus acutus), Chinchorro Banks (Biosphere Reserve), Quintana Roo, Mexico

Franco Banfi / American crocodile over seagrass bed (Crocodylus acutus), Chinchorro Banks (Biosphere Reserve), Quintana Roo, Mexico

Claudio Contreras / American crocodile (Crocodylus acutus) Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba, January. Vulnerable species.

Claudio Contreras / American crocodile (Crocodylus acutus), IUCN Vulnerable, Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba, January

Alex Mustard / RF - Split level photo of an American crocodile (Crocodylus acutus) floating at the surface over a shallow seagrass meadow, close to mangroves. Jardines de la Reina, Gardens of the Queen National Park...

Alex Mustard / Split level photo of an American crocodile (Crocodylus acutus) floating at the surface over a shallow seagrass meadow, close to mangroves. Jardines de la Reina, Gardens of the Queen National Park, Cub...