Alex Mustard / Pair of crown-of-thorns sea stars (Acanthaster planci) feeding on a coral colony. La Paz, Baja California Sur, Mexico. Sea of Cortez, Gulf of California, East Pacific Ocean.

Shane Gross / Philippine dive guide looking at Crown-of-thorns sea star (Acanthaster planci) Malapascua, Philippines.

Nick Hawkins / Crown-of-thorns starfish, (Acanthaster planci). Cocos Island National Park, Costa Rica.

Claudio Contreras / Crown of Thorns seastar (Acanthaster planci) detail, Espiritu Santo National Park, Sea of Cortez (Gulf of California), Mexico, February

Claudio Contreras / Crown of thorns seastar (Acanthaster planci) eating coral, Espiritu Santo National Park, Sea of Cortez (Gulf of California), Mexico, February

Claudio Contreras / Crown of Thorns Seastar (Acanthaster planci) eating coral, Espiritu Santo National Park, Sea of Cortez (Gulf of California), Mexico, February

Jordi Chias / Crown-of-thorns starfish (Acanthaster planci) on the reef, Mozambique.

Bert Willaert / Crown of thorns starfish (Acanthaster planci), Kimbe Bay, West New Britain, Papua New Guinea

Claudio Contreras / Crown-of-thorns Seastar (Acanthaster planci) detail, Socorro Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), P...

Claudio Contreras / Crown-of-thorns Seastar (Acanthaster planci) detail, Socorro Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), P...

Claudio Contreras / Crown-of-thorns Seastar (Acanthaster planci) San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pac...

Georgette Douwma / Crown of thorns starfish (Acanthaster planci) Malapascua Island, Philippines, September