Claudio Contreras / Yellowfin mojarra (Gerres cinereus) in sinkhole, Casa Cenote, near Tulum, Yucatan Peninsula, Mexico, February

Alex Mustard / Three spot damselfish (Stegastes planifrons) guards his eggs. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / Threespot damselfish (Stegastes planifrons) defending its garden of algae, Georgetown, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Pete Oxford / Three spot damselfish, juvenile (Stegastes / Pomacentrus planifrons) on Great Star coral (Montastraea cavernosa) Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Three spot damselfish (Stegastes / Pomacentrus planifrons) Bonaire, Netherlands Antilles, Caribbean

Doug Perrine / Three spot damselfish {Pomacentrus planifrons} Bahamas

Roberto Rinaldi / Juvenile threespot damselfish (Stegastes planifrons) seeking refuge in thinleaf lettuce coral (Agaricia tenuifolia), Belize

Roberto Rinaldi / Juvenile threespot damselfish (Stegastes planifrons) and some smaller Blue chromis (Chromis Cyanea) swimming among the blades in a small colony of thin lettuce coral (Agaricia tenuifolia), Lighthouse...

Alex Mustard / Threespot damselfish (Stegastes planifrons) male, defending its eggs on a coral reef, Grand Cayman, Cayman Islands, Caribbean Sea.

Joel Sartore / Photo Ark / Three-spot damselfish (Stegastes planifrons) portrait, Gulf Specimen Marine Lab and Aquarium. Captive.

Joel Sartore / Photo Ark / Three-spot damselfish (Stegastes planifrons) portrait, Gulf Specimen Marine Lab and Aquarium. Captive.

Claudio Contreras / Threespot damselfish (Stegastes planifrons) juvenile, Cozumel Island, Caribbean Sea, Mexico.

Claudio Contreras / Threespot damselfish (Stegastes planifrons), Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico.