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Differences And Similarities Between Freshwater And Saltwater Fish?

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Differences And Similarities Between Freshwater And Saltwater Fish?
What are the Differences and Similarities between Freshwater and Saltwater Fish?
There are many differences between freshwater and saltwater fish, as the anatomy (how they absorb and dispose of unneeded water, sizes and reproduction), where they are located, climate, feeding and species. In addition, there are many similarities they share as they are some species that eats the same prey, the same food chain (the biggest will eat the smallest) and some parts from their anatomy (fish scales, gills, fins, etc.). Or that they are some species that live in both biomes.
The average temperature from the saltwater in the mixed layer (surface up to two-hundred meters) is between the twenty-four to the thirteen Degrees Celsius. Starting from the
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Every one of this freshwater fish die if they are place on a saltwater ecosystem.
And there are according to Cifuentes, Maria and Marcela (1986), some species of saltwater that are capable of migrate during their reproduction season to travel into freshwater with abundant oxygen to left their eggs. That is the case from the European sea Sturgeon and the Atlantic salmon. And exist the contrary case of some freshwater species that migrates from template freshwater to the coast warm waters. That is the case of the Anguilla rostrata.
The food web is almost the same between the freshwater and saltwater fish. In both habitats, the predator (the biggest marine animal) will eat the smallest, and the smallest will eat other animal that will be smallest. The sharks, wales, seals, etc. will eat the fish of good sizes like a white sturgeon, then the fish of good size like a tuna will eat any smallest animals that move in front of it, and the smallest fish will eat zooplankton. (Ogletree,
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In addition, the freshwater fish obtains water by osmosis in the gills; meanwhile the saltwater fish use the osmosis in the gills to lose water. And the freshwater fish excreted the excess of water and solutes in abundant urine, on the contrary the saltwater fish excreted the urea, unneeded other types of salt and minimum quantities of water in unusual

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