Alex Mustard / A shoal of Golden grey mullet (Liza aurata) swim in the surf breaking on the shore of El Hierro Island. Canary Islands, Spain. East Atlantic Ocean.

John Chan / Osprey (Pandion haliaetus) taking flight with a partially eaten Mullet (Mugilidae), Southern California, USA.

John Chan / Osprey (Pandion haliaetus) feeding on a Mullet (Mugilidae), Southern California, USA.

Michel Roggo / Striped mullet (Mugil cephalus) in Fanning Springs State Park, Florida, USA. March. Photographed for The Freshwater Project

Michel Roggo / Striped mullet (Mugil cephalus) at boundary of clear water of Fanning Springs and red water of the Suwannee River, Fanning Springs State Park, Florida, USA. March 2011. Photographed for The Freshwater...

Sue Daly / Bass Dicentrachus labrax, Wide angle, shoal swims by, 2013 , Sark, British Channel Islands, UK,

Sue Daly / Shoal of Bass (Dicentrachus labrax), Sark, British Channel Islands, UK, August.

Graham Eaton / Angler fishing at dusk in sea surf. Bass (Dicentrarchus labrax) are often caught as they hunt for food churned up by waves, Porth Ceiriad, Pwllheli, Gwynedd, Wales, UK, December 2016.

Graham Eaton / Angler fishing at dusk in sea surf. Bass (Dicentrarchus labrax) are often caught as they hunt for food churned up by waves, Porth Ceiriad, Pwllheli, Gwynedd, Wales, UK, December 2016.

Roger Powell / Osprey (Pandion haliaetus) male displaying by flying past with a Flathead grey mullet (Mugil cephalus) in its talons. Cedar Key, Levy County, Florida, USA April

Roger Powell / Osprey (Pandion haliaetus) male displaying by flying past with a Flathead grey mullet (Mugil cephalus) in its talons. Cedar Key, Levy County, Florida, USA April

Jean E. Roche / European seabass (Dicentrarchus labrax), caught by fisherman, Provence, France, April.

Graham Eaton / Little Grebe (Tachybaptus ruficollis) on water with juvenile Grey Mullet (Chelon labrosus). Bangor, Gwynedd, Wales. December.

Graham Eaton / Little Grebe (Tachybaptus ruficollis) on water with juvenile Grey Mullet (Chelon labrosus). Bangor, Gwynedd, Wales. December.

Nick Upton / Thick-lipped grey mullet (Chelon labrosus) swimming, Los Gigantes harbour, Tenerife, May.

Nick Upton / Three Thick-lipped grey mullet (Chelon labrosus) swimming, Los Gigantes harbour, Tenerife, May.

Juan Carlos Munoz / Man rolling a cigarette, with Bokkom fish, a salted and dried Southern mullet (Liza richardsonii) fishes, Velddrif Village, Berg River, West Coast Peninsula, Western Cape province, South Africa, Septe...

Juan Carlos Munoz / Bokkom fish, a salted and dried Southern mullet (Liza richardsonii) fishes, Velddrif Village, Berg River, West Coast Peninsula, Western Cape province, South Africa, September 2012.

Pascal Kobeh / Dominant male Galapagos sea lion (Zalophus wollebacki), hunting in a school of Galapagos mullets (Mugil galapagensis), Ecuador, Galapagos. Pacific ocean.

Pascal Kobeh / Mexican goatfish (Mulloidichthys dentatus) and Blue-and-gold snappers (Lutjanus viridis) in a feeding frenzy over Triggerfish eggs, Baja California peninsula, Mexico. Sea of Cortez.

Franco Banfi / Shoal of Cardinal fish (Apogon imberbis) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Painted comber (Serranus scriba) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Cardinal fish (Apogon imberbis) with eggs in the mouth, Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / European seabass (Dicentrarchus labrax) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / European seabass (Dicentrarchus labrax) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Jose B. Ruiz / Shoal of Thick-lipped grey mullet {Chelon labrosus}, Mediterranean. Spain

Jose B. Ruiz / Shoal of Thick-lipped grey mullet {Chelon labrosus} in the Mediterranean. Spain.

Jose B. Ruiz / Shoal of Thick-lipped grey mullet {Chelon labrosus}, Mediterranean.

Jose B. Ruiz / Shoal of Thick-lipped grey mullet {Chelon labrosus} Mediterranean. Spain.

Juan Manuel Borrero / Flathead / Striped mullet {Mugil cephalus} captive Delta del Ebro NP, Spain

Jose B. Ruiz / Thick-lipped grey mullet {Chelon labrosus} Mediterranean Spain

Angelo Giampiccolo / A school of Red mullets (Mullus surmuletus) swims in the wreck of the SS Thistlegorm.

David Perpinan / Flathead grey mullet (Mugil cephalus) and Salema (Sarpa salpa) school swimming past the camera in the mouth of the Besos river. The fish enter and leave frame. Barcelona, Spain. October.

David Perpinan / Flathead grey mullet (Mugil cephalus) school swimming in the mouth of the Besos river. One fish enters the frame and then feeds on algae which is covering a rock. Barcelona, Spain. October.

David Perpinan / Flathead grey mullet (Mugil cephalus) and Salema (Sarpa salpa) school swimming past camera in the mouth of the Besos river. The fish enter and leave frame. Barcelona, Spain. October.

David Perpinan / Flathead grey mullet (Mugil cephalus) and Salema (Sarpa salpa) school swimming past camera in the mouth of the Besos river. The fish enter and leave frame. Barcelona, Spain. October.

Sergio Hanquet / Cardinalfish (Apogon imberbis) male, mouth brooding, close up head portrait, Tenerife, Canary Islands, Atlantic Ocean.

Sergio Hanquet / Cardinalfish (Apogon imberbis) male, mouth brooding, portrait, Tenerife, Canary Islands, Atlantic Ocean.

Sergio Hanquet / Cardinalfish (Apogon imberbis) male, mouth brooding, portrait, Tenerife, Canary Islands, Atlantic Ocean.

Joel Sartore / Photo Ark / European seabass (Dicentrarchus labrax) portrait, Littoral Station of Aguda, Portugal. Captive.

Joel Sartore / Photo Ark / European seabass (Dicentrarchus labrax) portrait, Littoral Station of Aguda, Portugal. Captive.

Joel Sartore / Photo Ark / Mediterranean cardinalfish (Apogon imberbis) portrait, Loro Parque's Aquarium. Captive, occurs in Mediterranean and eastern Atlantic Ocean.

Joel Sartore / Photo Ark / Mediterranean cardinalfish (Apogon imberbis) portrait, Loro Parque's Aquarium. Captive, occurs in Mediterranean and eastern Atlantic Ocean.

Joel Sartore / Photo Ark / Mediterranean cardinalfish (Apogon imberbis) portrait, Loro Parque's Aquarium. Captive, occurs in Mediterranean and eastern Atlantic Ocean.

Sergio Hanquet / Mediterranean cardinalfish (Apogon imberbis) swimming among rocks, Tenerife, Canary Islands, Atlantic Ocean.

Franco Banfi / Mediterranean cardinalfish (Apogon imberbis) head portrait, Marine Protected area Punta Campanella, Costa Amalfitana, Italy, Tyrrhenian Sea.

Tui De Roy / Green turtle (Chelonia mydas), juvenile being cleaned by Grey mullet (Mugil cephalus) school in warm shallow water, Isabela Island, Galapagos, South America, Pacific Ocean.

David Fleetham / Fringelip mullet (Crenimugil crenilabis) feeding over coral reef, Bali, Indonesia.

Franco Banfi / Cardinal fish (Apogon imberbis) Punta Campanella Marine Protected Area, Costa Amalfitana, Italy, Tyrrhenian Sea, Mediterranean.

Chris Shields / Illustration of Thick-lipped mullet (Chelon labrosus)

Doug Perrine / Striped mullet (Mugil cephalus), two feeding by surface skimming. Sand Island, Midway Atoll National Wildlife Refuge, Papahanaumokuakea Marine National Monument, Northwest Hawaiian Islands, USA.

Doug Perrine / Striped mullet (Mugil cephalus), two feeding by surface skimming. Sand Island, Midway Atoll National Wildlife Refuge, Papahanaumokuakea Marine National Monument, Northwest Hawaiian Islands, USA.

Willem Kolvoort / Grey mullets (Chelon sp) in the shallow reef of Cosmoledo Island, Seychelles, Indian Ocean