David Fleetham / Great barracuda (Sphyraena barracuda) with three parasitic Copepods at end of upper jaw. Hawaii.

Juergen Freund / Great barracuda (Sphyraena barracuda) West New Britain, Papua New Guinea

Juergen Freund / Great barracuda (Sphyraena barracuda) with Teira batfish (Platax teira) in background, Kimbe Bay, West New Britain, Papua New Guinea.

Juergen Freund / Great Barracuda {Sphyraena barracuda} Caribbean

Brent Hedges / Great barracuda {Sphyraena barracuda} Andaman Sea, Indo-Pacific

Brent Hedges / Great barracuda {Sphyraena barracuda} Andaman Sea, Indo-Pacific

Fred Bavendam / Blackfin Barracuda (Sphyraena qenie) school off of Lizard Island, Great Barrier Reef, Queensland, Australia

Gary Bell/ Oceanwide / Great Barracuda (Sphyraena barracuda), Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Great Barracuda (Sphyraena barracuda), Great Barrier Reef, Australia

David Fleetham / Great barracuda (Sphyraena barracuda) over coral reef. Hawaii.

David Fleetham / Great barracuda (Sphyraena barracuda) with two endemic Hawaiian cleaner wrasse (Labroides phthirophagus) cleaning it. Hawaii.

David Fleetham / Great barracuda (Sphyraena barracuda) with a ribbon of baitfish snaking their way under a dock off Bonaire, Caribbean.

David Fleetham / Great barracuda (Sphyraena barracuda) swimming over coral reef, Bonaire, Caribbean.

Alex Mustard / Great barracuda (Sphyraena barracuda) inside the bridge of the wreck of the USS Kittiwake. Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Enrique Lopez-Tapia / Great barracuda (Sphyraena barracuda), two displayed on beach with fishermen standing beyond, Orango Island, Orango Islands National Park, Bijagos UNESCO Biosphere Reserve, Guinea Bissau, February 201...

Pete Oxford / Great barracuda (Sphyraena barracuda) laid out on beach. Research MAR Alliance is performing population assessments on Sharks, Rays, and Great Barracuda to aid with management and protection. They are...

Pete Oxford / MAR Alliance researchers taking samples from Great barracuda (Sphyraena barracuda) with Nurse shark (Ginglymostoma cirratum) in the water below after samples have been taken. The samples are to deter...

Pascal Kobeh / Great barracuda (Sphyraena barracuda) on the wreck of Puerto Morelos, Yucatan peninsula, Mexico. Caribbean.

Pascal Kobeh / Great barracuda (Sphyraena barracuda) on the wreck of Puerto Morelos, Yucatan peninsula, Mexico. Caribbean.

Pascal Kobeh / Great barracuda (Sphyraena barracuda) in open water, Maldives. Indian Ocean.

Pascal Kobeh / Great barracuda (Sphyraena barracuda) on reef, Sudan. Red Sea.

Pascal Kobeh / Great barracuda (Sphyraena barracuda) in open water, San Salvador Island / Colombus Island, Bahamas. Caribbean.

Pascal Kobeh / Great barracuda (Sphyraena barracuda) in open water, San Salvador Island / Colombus Island, Bahamas. Caribbean.

Pascal Kobeh / Great barracuda (Sphyraena barracuda) in open water, San Salvador Island / Colombus Island, Bahamas. Caribbean.

Bence Mate / Head portrait of Great barracuda (Sphyraena barracuda) with teeth visible, Red sea, Egypt

Pete Oxford / Great barracuda (Sphyraena barracuda) Jardines de la Reina National Park, Cuba, Caribbean

Pete Oxford / Great Barracuda (Sphyraena barracuda), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Great Barracuda (Sphyraena barracuda). Xcalac Marine Reserve, South Yucatan Peninsula, Mexico.

Juergen Freund / Solitary Great barracuda (Sphyraena barracuda) in the Liberty wreck with diver, Bali, Indonesia, September 2009.

Claudio Contreras / Shoal of Horse-eye jack / trevally (Caranx latus) with Great barracuda (Sphyraena barracuda) in the background, Cancun National Park, Caribbean Sea, Mexico, July

Fred Bavendam / Great Barracuda (Sphyraena barracuda), Bali, Indonesia

Jeff Rotman / Close-up of divers interacting with Giant Great Barracuda (Sphyraena barracuda) in Bahamas, Caribbean Sea Model released.

Norbert Wu / Great Barracuda (Sphyraena barracuda) school, Indonesia

Juergen Freund / Schooling Great barracudas {Sphyraena barracuda} Indo-Pacific

Nature Production / School of Great Barracuda {Sphyraena barracuda} Papua New Guinea

Juergen Freund / Great barracuda schooling {Sphyraena barracuda} Indo Pacific

Brent Hedges / Great barracuda {Sphyraena barracuda} Andaman Sea, Indo-Pacific

Brent Hedges / Great barracuda {Sphyraena barracuda} Andaman Sea, Indo-Pacific

Doug Perrine / Great barracuda {Sphyraena barracuda} Atlantic

Doug Perrine / Diver with Great Barracuda {Phrynaea barracuda} Saba, Malaysia

Norbert Wu / Cavalla (Caranx sp) school and Great Barracuda (Sphyraena barracuda) swirl behind walls of Sea Fans, Papua New Guinea

Norbert Wu / Great Barracuda (Sphyraena barracuda) with hook in mouth, Roatan Island, Honduras

Fred Bavendam / Great Barracuda (Sphyraena barracuda) portrait, South Caicos Island, British West Indies, Caribbean

Fred Bavendam / Blackfin Barracuda (Sphyraena qenie) schooling, Lizard Island, Great Barrier Reef, Queensland, Australia

Juergen Freund / Great Barracuda (Sphyraena barracuda) Caribbean.

Peter Scoones / Great barracuda {Sphyraena barracuda} Cuba

Juergen Freund / Great barracuda, Caribbean

Jeff Rotman / Great barracuda fish (Sphyraena barracuda) with Jacks, Bahamas

Jeff Rotman / Great Barracuda schooling (Sphyraena barracuda) Bismarck Sea, Papua New Guinea.

Gary Bell/ Oceanwide / Great Barracuda (Sphyraena barracuda), Great Barrier Reef, Australia

Pete Oxford / Great Barracuda (Sphyraena barracuda) on reef, Jardines de la Reina National Park, Cuba

Angelo Giampiccolo / Great barracuda (Sphyraena barracuda) and diver, Belize Cayes, Caribbean.

Angelo Giampiccolo / Great barracuda (Sphyraena barracuda) at night, Belize Cayes, Caribbean.

Angelo Giampiccolo / Great barracuda (Sphyraena barracuda) with diver, Belize Cayes, Caribbean.

Angelo Giampiccolo / Diver photographing Great barracuda (Sphyraena barracuda) Cuba, Caribbean.

Norbert Wu / Great Barracuda (Sphyraena barracuda) school and other reef fish swimming over soft coral, Raja Ampat Islands, Indonesia

David Fleetham / Great barracuda (Sphyraena barracuda) swimming over seabed, being cleaned by Hawaiian cleaner wrasse (Labroides phthirophagus), Hawaii, Pacific Ocean.

Lucas Bustamante / Great barracuda (Sphyraena barracuda) school, North Seymour Island, Galapagos National Park, Pacific Ocean.

David Hall / Great Barracuda (Sphyraena barracuda) head portrait, Virgin Gorda, British Virgin Islands, Caribbean Sea.

Claudio Contreras / Fisherman showing catch of Yellowtail snapper (Ocyurus chrysurus) and Great barracuda (Sphyraena barracuda). Yellowtail snapper fishery, Utila Island, Honduras. Caribbean Sea.

Claudio Contreras / Great barracuda (Sphyraena barracuda) patrolling over Turtlegrass (Thalassia testudinum) habitat. Guanaja Island, Honduras. Caribbean Sea.

David Fleetham / Great barracuda (Sphyraena barracuda) swimming in open ocean, an unusual sighting in Hawaii, Hawaii, Pacific Ocean.

Franco Banfi / Great Barracuda (Sphyraena barracuda), Moorea Island, French Polynesia, Pacific Ocean.

David Fleetham / Great barracuda (Sphyraena barracuda) can reach six feet in length, relatively rare to see underwater in Hawaii, off Molokini, North Pacific Ocean, Hawaii.

Pascal Kobeh / Great barracuda (Sphyraena barracuda) on the reef, The Gardens of the Queen, Cuba, Caribbean Sea.

Pascal Kobeh / Great barracuda (Sphyraena barracuda) on the reef, The Gardens of the Queen, Cuba, Caribbean Sea.

Pascal Kobeh / Great barracuda (Sphyraena barracuda) on the reef with Jackfish (Caranx latus) and surrounded by Masked gobies (Coryphopterus personatus) or Glass gobies (Coryphopterus hyalinus), The Gardens of the Q...

David Fleetham / Great barracuda (Sphyraena barracuda) being cleaned by an endemic Hawaiian cleaner wrasse (Labroides phthirophagus) at a cleaning station, Hawaii.

Shane Gross / Great barracuda (Sphyraena barracuda) waits in ambush for small fish in the mangroves, Bahamas.

Shane Gross / Great barracuda (Sphyraena barracuda) waiting in ambush for small fish in the mangroves. The Bahamas.

Tony Wu / Great barracuda (Sphyraena barracuda) stalking prey, close up of mouth with sharp teeth. Bangka, North Sulawesi, Indonesia.

Claudio Contreras / Great barracuda (Sphyraena barracuda), Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba.

Shane Gross / Great barracuda (Sphyraena barracuda) hunting silversides in a red mangrove (Rhizophora mangle) forest. Grand Bahama Island, Bahamas.