Fred Bavendam / Collared Butterflyfish (Chaetodon collare) school, Andaman Sea, Thailand

Fred Bavendam / Eyepatch Butterflyfish (Chaetodon adiergastos) school swimming along shallow reef, Bali, Indonesia

Fred Bavendam / Butterfly Perch (Caesioperca lepidoptera) swimming amidst Gorgonian Sea Whips, fans and various kinds of sponges at 40 meters depth, Tasman Peninsula, Tasmania, Australia

Fred Bavendam / Butterfly Perch (Caesioperca lepidoptera) and diver swimming amidst Gorgonian Sea Whips, Fans and various kinds of Sponges at 40 meters depth, Tasman Peninsula, Tasmania, Australia

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...

Magnus Lundgren / Wild Wonders of China / Zebra lionfish, or zebra turkeyfish (Dendrochirus zebra) venomous species, Xiaoliuqiu Island, Taiwan

Gary Bell/ Oceanwide / Meyer's Butterflyfish (Chaetodon meyeri) being cleaned by Blue-streaked Cleaner Wrasse (Labroides dimidiatus), Great Barrier Reef, Queensland, Australia

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.