Question

What will happen if a marine fish is placed in freshwater?

Answer 1

Hint: Fish that dwell in ocean water are known as saltwater fish or marine fish. Fish in saltwater can swim and live alone or in a huge group known as a school. Aquariums with saltwater fish are highly popular for amusement. Many saltwater fish are harvested for consumption or for aquaculture. Many fish species, on the other hand, have been overfished and are threatened by marine pollution or biological shifts brought on by climate change.

Complete answer:
Because one habitat offers them chances that have traditionally contributed to their survival, some fish prefer to dwell in freshwater while others prefer to live in seawater. The concentration of salt is a clear distinction between the two ecosystems. In a salt-deficient environment, freshwater fish preserve physiological systems that allow them to concentrate salts inside their bodies; in a hypertonic environment, marine fish expel surplus salts. Both systems are retained in fish that dwell in both habitats.
When a marine fish is put in freshwater, the surrounding water enters the fish's body through endosmosis, causing the cells to enlarge and the animal to die. The fish are extremely sensitive to even little changes in water salinity. Because their bodies are heavily concentrated in salt solution, saltwater fish cannot live in freshwater. Water would flow into their bodies until all of their cells accumulated enough water to cause them to swell and finally die. Freshwater fish, on the other hand, cannot thrive in the ocean or saltwater since it is too salty for them. The water in their bodies would leak out of their cells, causing them to become dehydrated and die.

Note:
There are many Anthropogenic hazards to marine fish. Overfishing, pollution, habitat loss and destruction, climate change, and invasive species are all examples of human-caused hazards. The hazards listed above all have a variety of detrimental direct and indirect effects on marine ecosystems. These concerns are expected to continue to exist in marine environments as the human population grows at an exponential rate.