Shane Gross / Red lionfish (Pterois volitans) swimming under a coral ledge, Palau.

Shane Gross / Invasive Lionfish (Pterois volitans) which have taken over and are wiping out native fish in the Atlantic ocean. The highest densities are in the northern gulf of Mexico. Destin, Florida, USA.

Shane Gross / Invasive Lionfish (Pterois volitans) which have taken over and are wiping out native fish in the Atlantic ocean. The highest densities are in the northern gulf of Mexico. Destin, Florida, USA.

Doug Perrine / Lionfish {Pterois miles} with Seafan in foreground, Thailand

Georgette Douwma / Lionfish (Pterois miles) swimming by shipwreck. Red Sea, Egypt

Chris Newbert / Common Lionfish (Pterois volitans), 70 feet deep, Solomon Islands

Chris Newbert / Soft Coral (Dendronephthya sp) schooling Pygmy Sweeper (Parapriacanthus ransonneti) and Lionfish (Pterois volitans)

Chris Newbert / Common Lionfish (Pterois volitans) swimming over reef, 20 feet deep, Red Sea

Chris Newbert / Common Lionfish (Pterois volitans) swimming over coral reef, Red Sea

Gary Bell/ Oceanwide / Zebra Lionfish (Dendrochirus zebra), Great Barrier Reef, Australia

Fred Bavendam / Common Lionfish (Pterois volitans) lurking among Feather Star Crinoids clinging to the lip of a large Barrel Sponge, Bali, Indonesia

Shane Gross / Red lionfish (Pterois volitans) hunting Moluccan cardinal fish (Apogon moluccensis) in Tape grass (Enhalus acoroides) seagrass bed. North Sulawesi, Indonesia.

Shane Gross / Red lionfish (Pterois volitans), two on sea floor beside Crocodile fish (Cymbacephalus beauforti), an ambush predator camouflaged and hidden. Marsa Alam, Egypt.

David Fleetham / Underwater photographer lines up on two Lionfish (Pterois volitans) resting in a sponge, Indonesia.

David Fleetham / Lionfish (Pterois volitans) in white polyp black coral, Tulamben, Bali, Indonesia.

Georgette Douwma / Juvenile Common lionfish (Pterois volitans). Tulamben, Bali, Indonesia.

Georgette Douwma / Common lionfish (Pterois volitans) hunting cardinalfish over coral reef. Andaman Sea, Thailand.

Alex Mustard / A backlit photo of a British World War II BSA M20 motorbike inside Hold 2 (port side, upper level) of the wreck of the Thistlegorm, with lionfish (Pterois volitans). Sha'ab Ali, Red Sea. Sinai, Eg...

Alex Mustard / Clearfin lionfish (Pterois radiata) mating. The female (left) has just released a raft of eggs, which is visible between her tail and the red face of the male. Taken around dusk, during the summer in...

Fred Olivier / Lionfish (Pterois volitans) above coral, swimming in current, Uepi Island, Solomon Islands.

Fred Olivier / Lionfish (Pterois volitans) swimming over a coral reef, Uepi Island, Solomon Islands.

Fred Olivier / Lionfish (Pterois volitans) above coral, swimming in current, Uepi Island, Solomon Islands.

David Hall / Blackfoot firefish (Parapterois hetururus) on gravel. Pantar, Alor Archipelago, Indonesia.

David Hall / Blackfoot firefish (Parapterois heterurus), blue stripes on pectoral fin when threatened, on gravel. Pantar, Alor Archipelago, Indonesia.

David Hall / Blackfoot firefish (Parapterois heterura), blue striped pectoral fins displayed as a response to threat. Pantar Island, Alor Archipelago, Indonesia.

Shane Gross / Lionfish derby, a competition to catch invasive Lionfish (Pterois volitans). One team caught 466 lionfish in a single day during the Green Turtle Cay, Bahamas, June 2016

Shane Gross / Lionfish (Pterois volitans) caught in a Lionfish derby, a competition to catch invasive Lionfish (Pterois volitans). One team caught 466 lionfish in a single day during the Green Turtle Cay, Bahamas,...

Shane Gross / Scuba diver feeds an invasive lionfish (Pterois volitans) to a Caribbean reef shark (Carcharhinus perezi) off Grand Bahama Island, Bahamas. It was once thought that if the sharks learned that lionfish...

Shane Gross / Scuba diver feeds an invasive lionfish (Pterois volitans) to a Caribbean reef shark (Carcharhinus perezi) off Grand Bahama Island, Bahamas. It was once thought that if the sharks learned that lionfish...

Shane Gross / Scuba diver spears and invasive lionfish (Pterois volitans) off Grand Bahama Island, Bahamas. Spearing is illegal in The Bahamas, however, a special exemption was made for lionfish.

Shane Gross / An invasive lionfish (Pterois volitans) is fed to a Caribbean reef shark (Carcharhinus perezi) off Grand Bahama Island, Bahamas. It was once thought sharks could be trianed to feed on lionfish by feed...

Shane Gross / A scuba diver spears an invasive lionfish (Pterois volitans) off Grand Bahama Island, Bahamas. Spearing is illegal in The Bahamas, however, a special exemption was made for lionfish.

Shane Gross / Sign for Lionfish drop off. Local fisherman are paid to catch invasive lionfish (Pterois volitans) in the Caribbean to help reduce their numbers and, in turn, help the reefs. Image made on Eleuthera,...

Shane Gross / Mural painted on the side of a small grocery store on Eleuthera Island, Bahamas depicting how the fate of the Bahamian fishery is tied closely to that of the invasive lionfish (Pterois volitans). Eleu...

Shane Gross / Woman wearing a Lionfish (Pterois volitans) necklace in The Bahamas. The species is invasive and fisherman are encouraged to cull them.

Shane Gross / Jewelry made from the tails of invasive lionfish (Pterois volitans) Eleuthera, Bahamas.

Shane Gross / Invasive lionfish (Pterois volitans) in a lab tank to be studied by researchers. Bahamas, September 2015.

Shane Gross / The tails of invasive lionfish (Pterois volitans) dry on a cutting board. The tails will be made into jewelry. Image made on Eleuthera, Bahamas.

Shane Gross / An invasive Lionfish (Pterois volitans) and tourist snorkelers, The Bahamas.

Shane Gross / Invasive lionfish (Pterois volitans) on the end of a spear. Florida, USA. February 2018. In order to keep their numbers low, scuba divers and snorkellers are encouraged to spear as many as possible.

Shane Gross / An invasive lionfish (Pterois volitans) hunting at night off Eleuthera Island, Bahamas.

Shane Gross / Lionfish (Pterois volitans) over coral at night in The Bahamas. Invasive species.

Shane Gross / Lionfish (Pterois volitans) over coral in The Bahamas. Invasive species.

Shane Gross / Invasive Lionfish (Pterois volitans) is caught as part of an effort to help coral reefs adapt to this new predator. Abaco, Bahamas.

Franco Banfi / Scuba diver hunting invasive Lionfish (Pterois volitans) to feed to Crocodiles. May 2015.

Georgette Douwma / Juvenile Red lionfish (Pterois volitans) West Papua, Indonesia.

Alex Mustard / Portrait of a gurnard lionfish (Parapterois heterura) on the seabed. Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.

Franco Banfi / Spotfin lionfish (Pterois antennata) portrait, Cabilao House Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.