Jeff Rotman / Close up of mouth of a Stoplight parrotfish (Sparisoma viride) Bahamas, Caribbean

Shane Gross / Stoplight parrotfish (Sparisoma viride) eating algae on coral reef. Eleuthera, Bahamas.

Pascal Kobeh / European parrotfish (Sparisoma cretense) female with a Blacktail comber (Serranus atricauda) on the reef, Canary Islands

Pascal Kobeh / European parrotfish (Sparisoma cretense) female, Azores, Atlantic ocean.

David Fleetham / Redtail parrotfish (Sparisoma chrysopterum) female or initial male phase, Bonaire, Netherlands Antilles, Caribbean.

David Fleetham / Spotlight parrotfish (Sparisoma viride) terminal male phase, scraping algae off dead coral with beak-like fused teeth. Bonaire, Netherlands Antilles, Caribbean.

Linda Pitkin / Stoplight parrotfish (Sparisoma viride), male, biting coral rock (feeding on encrusting algae) Bonaire, Leeward Antilles, Caribbean.

Pete Oxford / Stoplight parrotfish (Sparisoma viride) on coral reef, Hol Chan Marine Reserve, Belize.

Franco Banfi / Mediterranean parrotfish (Sparisoma cretense) female with Ornate wrasses (Thalassoma pavo), Santa Maria Island, Azores, Portugal, Atlantic Ocean

Alex Mustard / Portrait of a female Stoplight parrotfish (Sparisoma viride) hovering above a coral reef. Bucaneer Reef, Cayman Brac, Cayman Islands. Caribbean Sea.

Georgette Douwma / Stoplight parrotfish (Sparisoma viride), super male (will always remain male), terminal phase. Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Stoplight parrotfish (Sparisoma viride) terminal phase. Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.