In the question of whether fish living in the ocean can migrate to live in freshwater basins, we first need to clarify a basic biological knowledge: the living environment of fish is limited by their physiological structure and ecological adaptability.
1. Differences in physiological structure between marine fish and freshwater fish
There are significant differences in the physiological structure of marine and freshwater fish. These differences are mainly reflected in the respiratory system, fluid balance, and adaptability to water pressure and water quality.
1.Respiratory system: The respiratory system of marine fish is usually adapted to the high salinity of seawater, and its gill structure can effectively filter oxygen from seawater. The gill structure of freshwater fish is adapted to the low-salinity freshwater environment and can effectively absorb oxygen in the water.
2.Fluid balance: The osmotic pressure in marine fish is consistent with the high salinity of seawater, while the osmotic pressure in freshwater fish is adapted to the freshwater environment. If an ocean fish suddenly enters a freshwater environment, the water in its body will be rapidly lost due to the difference in osmotic pressure, leading to life-threatening conditions.
3.Water pressure and water quality: Ocean fish live in high-pressure seawater for a long time, and their body structure has been fully adapted to this environment. The water pressure in freshwater basins is much lower than that of seawater, and if marine fish are suddenly transferred to this environment, they may not be able to survive due to drastic changes in water pressure. In addition, marine fish are adaptable to a variety of minerals in seawater, and the water quality in freshwater is significantly different from that of seawater, which also makes it more difficult for marine fish to live in freshwater.
2. Example demonstration:
There are many examples of attempts to introduce marine fish into freshwater basins, but the success is very limited. Many attempts have failed, as most marine fish are unable to adapt to the physiological challenges of a freshwater environment. For example, salmon, as a typical marine fish, migrate to freshwater to spawn during the breeding season, but they live in freshwater for a very short period of time and return to the ocean soon after spawning.
3. Conclusion:
In summary, due to the limitations of physiological structure and ecological adaptability, it is difficult for fish living in the ocean to adapt to the living environment of freshwater basins. As a result, most marine fish cannot survive in freshwater for long periods of time. Of course, there are some special fish such as salmon that can live in freshwater for a short time during a specific breeding season. But for the vast majority of marine fish, freshwater basins are not a suitable place to live. Publish a collection of dragon cards to share millions of cash