Mollies are a freshwater fish commonly known as the Molly.

The 1975 legislature designated the Florida largemouth bass as the official state freshwater fish.
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To look for the effects of freshwater acidification, scientists at the University of British Columbia (UBC) in Vancouver, Canada, hatched and raised the salmon in tanks with varying levels of CO2 dissolved in the water. One tank had the equivalent of 450 parts per million (ppm)—a little higher than current atmospheric levels. Another had 1000 ppm, a third had 2000 ppm, and levels in the last shifted between 450 and 2000 ppm. After 10 weeks, the fish were moved to saltwater tanks that also had a range of CO2 levels, where they continued to mature.
North American freshwater fishes are going extinct at rates that concern scientists
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Most novice fish owners begin with a freshwater bowl or other types of beginner fish tanks. A desktop aquarium kit complete with a freshwater fish tank, filter, filter cartridge, lighted hood, water conditioner, and fish food is the perfect way to get started as an aquarist. While these kits contain the basic accessories most beginner fish tanks need, there is more fun to be had in choosing your own plants, rocks, colored substrates and decorative ornaments. There are saltwater aquariums that have been specifically designed for display on shelves, while some are equipped with reversible backgrounds to change with your mood or home décor. There are even octagon-shaped fish tanks that act as unique tables, hold up to 28-gallons of water, and never fail as an interesting conversation piece for entertaining guests. Freshwater Game Fishing License required for these species; unlawful to sell these species.
Photo provided by FlickrProvides descriptions and treatment options for common freshwater fish diseases.
Photo provided by FlickrFreshwater fish compatibility chart and characteristics of different types of fish.
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Hundreds of millions of people worldwide would lack their prime source of protein without freshwater fish. Yet the lakes and river systems that supply them are often overlooked by policymakers, who focus sustainability efforts instead on ocean species.McIntyre recently conducted a global analysis of riverine fisheries—and the threats they face—and determined there is an urgent need to safeguard these regions. He and his team found that 90 percent of the global freshwater catch comes from ecosystems that are stressed by “above average” pollution, dambuilding, and invasive species.Marine fisheries tend to be commercial operations, while freshwater fishing is almost exclusively a means of subsistence. “Most freshwater fish catches don’t enter the global trade economy, so they draw less interest,” says University of Wisconsin–Madison zoologist Peter McIntyre.Freshwater aquarium fish care information and pictures ordered by freshwater fish species. Click on the picture of the freshwater fish species in the list below for detailed profiles along with comments and tips from fellow freshwater hobbyists.Nowhere are these challenges more potentially damaging than within Southeast Asia’s multicountry Mekong River system—the world’s biggest freshwater fishery. There, says McIntyre, many people rely on catfish and other river species as a critical source of dietary protein that could not easily be replaced. Our freshwater aquatics department is stocked with a wide array of fish, supplies, equipment, food and more. We strive to keep a wide selection of common and unusual fresh water tropical fish, with a knowledgeable staff to help you make the right choices for your tank.