Fishing can be done by both _____ and ____ of fish in marine and freshwater ecosystem.
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Freshwater fish have large, well-developed kidneys that are able to process vast quantities of water. Saltwater fish lose large quantities of internal body fluids through their gills because of osmosis. ... They replace lost water by consuming large quantities of saltwater.
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The two types of aquatic ecosystems are freshwater and marine, and the main difference is the salinity concentration
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