Neil Aldridge / Nile crocodile (Crocodylus niloticus) snatching a Mozambique tilapia (Oreochromis mossambicus) in its jaws, Shingwedzi River, Kruger National Park, South Africa.

Michel Roggo / Underwater view of Wadi Al Arbiyeen With Tilapia, probably Nile Tilapia (Oreochromis niloticus) Muscat Governorate, Sultanate of Oman. February. Photographed for The Freshwater Project

Michel Roggo / Underwater view of Wadi Al Arbiyeen With Tilapia, probably Nile Tilapia (Oreochromis niloticus) Muscat Governorate, Sultanate of Oman. February. Photographed for The Freshwater Project

Hanne & Jens Eriksen / Tilapia fish (Oreochromis) in lake, Green Mubazzarah Park, Jebel Hafeet, Al Ain, UAE, September 2009.

Steven Kazlowski / School of Tilapia (Oreochromis mossambicus) fish swimming in the Salton Sea in winter, Colorado Desert, California

Steven Kazlowski / Black-necked / Eared Grebe (Podiceps nigricollis) with a freshly caught Tilapia (Oreochromis mossambicus) fish in beak, catch in mouth, Salton Sea, Colorado Desert, California

Jane Burton / Mozambique mouthbrooder {Tilapia mossambica} female brooding a clutch of eggs in her mouth, captive, from Mozambique

Jane Burton / Mozambique mouthbrooder {Tilapia mossambica} male guarding nest, captive, from Mozambique

Nature Production / Mozambique Tilapia {Oreochromis mossambicus} raising youngs in its mouth, captive

Nature Production / Mozambique Tilapia raising young in its mouth {Oreochromis mossambicus} captive