Daniel Heuclin / Green Iguana (Iguana iguana) male sitting in vegetation. Miami (introduced species), USA, November.

Solvin Zankl / Close up of thorns of Crown of thorns starfish {Acanthaster planci} Sulawesi, Indonesia

Georgette Douwma / Crown of thorns starfish {Acanthaster planci} Andaman Sea, Thailand

Georgette Douwma / Crown of thorns starfish and butterflyfish on coral reef, Red Sea, Egypt.

Jeff Rotman / Crown-of-thorns starfish (Acanthaster planci) grazing on coral at night, Red Sea, Egypt

Juergen Freund / Tubbataha Reef rangers collecting thousands of Crown-of-thorns starfish (Acanthaster planci), an invasive species that has spread in the lagoon in epidemic proportions. Tubbataha Reef National Marine...

Juergen Freund / Crown-of-thorns starfish (Acanthaster planci) in the reef. Tubbataha Reef rangers collect thousands of these invasive animals which have spread in the lagoon in epidemic proportions. Tubbataha Reef Na...

Juergen Freund / Crown-of-thorns starfish (Acanthaster planci) collected by a snorkeler. Tubbataha Reef rangers collect thousands of these invasive animals which have spread in the lagoon in epidemic proportions. Tub...

Juergen Freund / Close up of spines of Crown-of-Thorns starfish (Acanthaster planci) Great Barrier Reef, Australia

Juergen Freund / Close up of Crown-of-Thorns Starfish (Acanthaster planci) feeding on Acropora coral, Great Barrier Reef, Australia.

Juergen Freund / Crown-of-Thorns Starfish (Acanthaster planci) feeding on Acropora coral, Great Barrier Reef, Australia.

Sue Daly / Crown of Thorns starfish (Acanthaster planci) on hard coral, Cebu, Philippines, March

Sue Daly / Crown of Thorns starfish (Acanthaster planci) on hard coral, Cebu, Philippines, March

Jeff Rotman / Arm and tubed feet of Crown of thorns starfish (Acanthaster planci) at night, Red Sea, Egypt

GEORGETTE DOUWMA / Crown-of-thorns starfish (Acanthaster planci) feeding on coral. Komodo, Indonesia.

GEORGETTE DOUWMA / Crown-of-thorns starfish (Acanthaster planci) and Blue starfish (Linckia laevigata) on coral reef. Komodo, Indonesia.

GEORGETTE DOUWMA / Crown-of-thorns starfish (Acanthaster planci) feeding on coral. Komodo, Indonesia.

GEORGETTE DOUWMA / Crown-of-thorns starfish (Acanthaster planci) feeding on coral. Komodo, Indonesia.

GEORGETTE DOUWMA / Crown of thorns starfish (Acanthaster planci) feeding on coral, Komodo, Indonesia

GEORGETTE DOUWMA / Crown of thorns starfish (Acanthaster planci) crawling over sandy area between reefs, Komodo, Indonesia

GEORGETTE DOUWMA / Crown-of-thorns starfish (Acanthaster planci) feeding on coral, Komodo, Indonesia

Juergen Freund / Snorkler collecting Crown of thorns starfish {Acathaster planci} Underwater Indo-Pacific

GEORGETTE DOUWMA / Crown-of-thorns starfish (Acanthaster planci) on coral reef, Red Sea, Egypt.

GEORGETTE DOUWMA / Crown-of-thorns starfish (Acanthaster planci) feeding on coral, Red Sea, Egypt.

GEORGETTE DOUWMA / Crown-of-thorns starfish (Acanthaster planci) on coral reef, Red Sea, Egypt.

GEORGETTE DOUWMA / Crown-of-Thorns cardinal fish (Siphamia fuscolineata) sheltering amongst spines of Crown-of-Thorns starfish {Acanthaster planci}, commensalism, Great Barrier Reef, Australia.

GEORGETTE DOUWMA / Crown-of-Thorns cardinal fish (Siphamia fuscolineata) sheltering amongst spines of Crown-of-Thorns starfish {Acanthaster planci}, commensalism, Great Barrier Reef, Australia.

GEORGETTE DOUWMA / Crown-of-thorns starfish (Acanthaster planci) on coral reef, Egypt, Red Sea.

Jeff Rotman / Crown-of-thorns Starfish (Acanthaster planci), close-up of spines. Egypt, Red Sea.

Jeff Rotman / Crown-of-Thorns Starfish (Acanthaster planci) mouth and feet. Egypt, Red Sea.

Jeff Rotman / Crown-of-Thorns Starfish (Acanthaster planci) feeding on coral at night. Egypt, Red Sea.

Juergen Freund / Diver with Crown of thorns starfish {Acanthaster planci} Indo-Pacific ocean

GEORGETTE DOUWMA / Table coral showing damage caused by Crown of Thorns starfish Red Sea Egypt

Constantinos Petrinos / Giant Triton trumpet shell (Charonia tritonis) natural predator of Crown of thorns starfish, Sulawesi, Indonesia

Doug Perrine / Crown of thorns starfish {Acanthaster planci} feeding on coral, Similan Is, Thailand

GEORGETTE DOUWMA / Crown of thorns starfish {Acanthaster planci} Red Sea, Egypt

Doug Perrine / Scalefin anthias ready to shelter in Crown of Thorns starfish, Papua New Guinea

GEORGETTE DOUWMA / Crown-of-Thorns starfish (Acanthaster planci) feeds on coral, Irian Jaya / West Papua, Indonesia (West Papua).

GEORGETTE DOUWMA / Crown of thorns starfish {Acanthaster planci} Red Sea

Fred Bavendam / Crown-of-thorns Starfish (Acanthaster planci) feeding on coral reef, Red Sea, Egypt

Chris Newbert / Crown-of-thorns Starfish (Acanthaster planci) leg detail showing sharp toxic spines above and suction-cup feet below, Kona, Hawaii

Chris Newbert / Atlantic Trumpet Triton (Charonia tritonis) shell and Crown-of-thorns Starfish (Acanthaster planci), Kona, Hawaii

Norbert Wu / Crown-of-thorns Starfish (Acanthaster planci) eats coral and leaves behind bleached skeleton, Philippines

Chris Newbert / Crown-of-thorns Starfish (Acanthaster planci) detail, Kona, Hawaii

Norbert Wu / Crown-of-thorns Starfish (Acanthaster planci) population explosion, venomous starfish feed on and damage coral reefs, cause of explosion is a mystery, Palau

Norbert Wu / Crown-of-thorns Starfish (Acanthaster planci) feeds on and kills coral colony, Seychelles, Indian Ocean

Norbert Wu / Crown-of-thorns Starfish (Acanthaster planci) close-up of venomous spines kills coral, Similan Islands, Thailand

Norbert Wu / Crown-of-thorns Starfish (Acanthaster planci) are cleared by Ron Leidich since they damage coral reefs, cause of population explosion is unknown, Palau

Norbert Wu / Crown-of-thorns Starfish (Acanthaster planci) feeding on corals, Sea of Cortez, Baja California, Mexico

Fred Bavendam / Crown-of-thorns Starfish (Acanthaster planci), Great Barrier Reef, Queensland, Australia

Fred Bavendam / Crown-of-thorns Starfish (Acanthaster planci), Red Sea, Hurghada, Egypt

Jeff Rotman / Close up of spines and skin of Crown of Thorns starfish {Acanthaster planci} Red Sea.

Jeff Rotman / Poisonous spines of Crown-of-thorns starfish {Acanthaster planci} Cocos Is,

GEORGETTE DOUWMA / Crown of Thorns starfish. Australia, Great Barrier Reef

GEORGETTE DOUWMA / Crown of Thorns starfish. Australia, Great Barrier Reef

GEORGETTE DOUWMA / Crown of Thorns starfish, Australia Great Barrier Reef

GEORGETTE DOUWMA / Crown of Thorns starfish, Australia Great Barrier Reef

GEORGETTE DOUWMA / Crown of Thorns starfish, Andaman Sea

GEORGETTE DOUWMA / Crown of Thorns starfish on coral-reef, Andaman Sea, Indian Ocean

Juergen Freund / Tube feet and spines of crown of thorns starfish {Acanthaster planci}. Philippines

Constantinos Petrinos / Crown of thorns starfish feed on coral {Acanthaster planci} Lembeh strait, Sulawesi Indonesia

GEORGETTE DOUWMA / Crown-of-Thorns starfish, Andaman Sea, Indian Ocean

Roberto Rinaldi / Crown-of-thorns starfish (Acanthaster planci) eating a coral, Great Barrier Reef, Australia

Juergen Freund / Crown of thorn starfish {Acanthaster planci} and diver, Sea of Cortez, Mexico

Peter Scoones / Crown of thorns starfish {Acanthaster planci} on coral reef, Indo pacific

GEORGETTE DOUWMA / Crown of thorns starfish {Acanthaster planci} Andaman sea Thailand

Juergen Freund / Crown of thorns starfish in basket {Acanthaster planci} Indo-pacific

Constantinos Petrinos / Crown of thorns starfish feed on coral {Acanthaster planci} Lembeh strait Sulawesi Indonesi

Juergen Freund / Snorkeler collecting Crown of thorns starfish {Acanthaster planci} Indo-pacific