Franco Banfi / Freshwater fish including Mayan cichlids (Mayaheros urophthalmus) between aquatic plants and leaves, Cenote Nicte-Ha, near Tulum, Quintana Roo, Yucatan Peninsula, Mexico. MontPhoto Competition 2023 -...

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

Pete Oxford / Butterfly peacock bass (Cichla ocellaris) in permanent freshwater pond, savannah, Rupununi, Guyana

Michel Roggo / Butterfly peacock bass (Cichla ocellaris) in flooded forest, Rio Tabajos, Amazon, Brazil.

Michel Roggo / Banded cichlid (Heros severus) in flooded forest. Rio Tabajos, Amazon, Brazil.

Michel Roggo / Uaru / Triangle cichlid (Uaru amphiacanthoides) in flooded forest, Rio Tabajos, Amazon, Brazil.

Michel Roggo / Three-barred / speckled peacock bass (Cichla temensis) entering flooded forest to spawn. Tributary Rio Tabajos, Para, Brazil.

Jane Burton / Angelfish {Pterophyllum scalare} melanic veiltail 'black lace' variety, captive, from rivers of Amazon basin, South america

Doug Wechsler / Golden cichlid (Pseudotropheus auratus). East Africa

Michel Roggo / Cichlids (Cichlidae) in Lake Malawi, Malawi. Photographed for The Freshwater Project

Michel Roggo / Cichlids (Cichlidae) in Lake Malawi, Malawi. Photographed for The Freshwater Project

Alex Mustard / Mayan cichlids (Cichlasoma urophthalmus) shelter amongst Mangrove roots (Rhizophora mangle) in a coastal cenote that mixes fresh and salt water. Casa Cenote, Tulum, Yucatan, Mexico.