Wikimedia Commons has media related to Freshwater ecology.

Freshwater ecology — freshwater ecosystems and elements in aquatic ecology and limnology.

Aquatic ecosystems

General	Acoustic ecology Adaptation Agent-based models Algal bloom Anoxic waters Aquatic animals (Insects Mammals) Aquatic plants Aquatic science Benthos Biodiversity research Bioluminescence Biomass Biomonitoring Cascade effect Colored dissolved organic matter Camouflage and mimicry Dead zone Ecohydrology Ecosystems Eutrophication Fisheries science Food chain Food web GIS and aquatic science Hydrobiology Hypoxia Isotope analysis Macrobenthos Meiobenthos Microbial ecology Microbial food web Microbial loop Nekton Neuston Particle Pelagic zone Photic zone Phytoplankton Plankton Pleuston Predation Productivity Ramsar Convention Respiration Schooling Sediment trap Siltation Spawning Substrate Thermal pollution Toxicology Trophic level Water column Zooplankton More...
Freshwater	Biology Biomes Ecosystems freshwater lake river Fish Hyporheic zone Limnology Lake stratification Macrophyte Pond Fish pond Rheotaxis Stream bed Stream pool Trophic state index Upland and lowland Water garden Wetland brackish marsh freshwater marsh swamp bog fen Environmental quality More...
Ecoregions	Freshwater (List) Marine (List) The Everglades Maharashtra The North Pacific Subtropical Gyre The San Francisco Estuary

Marine	Marine biology Marine chemistry Deep scattering layer Diel vertical migration Ecosystems large marine marine) f-ratio Food web Iron fertilization Marine snow Ocean nourishment Oceanic physical-biological process Primary production Ocean turbidity Photophore Thorson's rule Upwelling Viral shunt Whale fall More...
Marine life	Bacteriophages Census Fish coastal coral reef deep sea demersal pelagic Deep sea communities Deep sea creature Deep-water coral Invertebrates Larvae Mammals Marine life Microorganisms Paradox of the plankton Prokaryotes Protists Reptiles Seabirds Seashore wildlife Vertebrates Viruses Wild fisheries
Marine habitats	Coastal habitats Coastal biogeomorphology Bay mud Cold seeps Coral reefs Davidson Seamount Estuaries Intertidal ecology Intertidal wetlands Kelp forests Hydrothermal vents Lagoons Mangroves Marine biomes Mudflats Oyster reefs Rocky shores Salt marshes Salt pannes and pools Seagrass meadows Sponge grounds Sponge reefs Tide pools
Issues	Coral bleaching Ecological values of mangroves Fisheries and climate change HERMIONE Human impact on marine life Marine conservation Marine conservation activism Marine pollution Marine Protected Area
Oceans portal