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