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the marine fish would pretty much suffocate and die. so putting marine fish in fresh water is not a good idea.
It is about osmoregulation. Salt water fish has some level of salt in its cells, which is low in concentration than marine water and more than the freshwater. If you put a saltwater fish in fresh water, excess amount of water will enter the cells of the fish and the cells rupture. This is why salt water fish cannot survive in freshwater.
marine fish lay eggs in fresh water river
Damsel fish are OK in a Marine (sea water) environment. They will not survive in fresh water.
Some marine fish can live in fresh water. But most marine fish are adapted to salt water; because of the salt in the water their body needs to do things differently, and they are used to being in salt water. If you put them in fresh water, their body can't do the same thing, therefore most of them die. For more information, see the related question.
yes all puffer fish can survive in fresh water areas
Because marine fish live in salt water because there found in the ocean.
No! marine fish are salt water fish and tropicals are fresh water fish, this cannot be changed.
No. Puffer fish can only survive in the ocean.
Fish are a part of the marine biome. There are two forms of marine biomes: fresh water biomes and salt water biomes.
Fresh water fish survive just as well as fresh water fish. Maybe this question isn't the one that you actually meant to ask?
There are both marine (salt water) and fresh water fish in the tropics.