Which one of the following is not a marine fish? A Sardine B Rohu C Mackerel D Hilsa

Identification of Marine and Freshwater Fish

1. Understanding Marine Fish: Marine fish are species that live in saltwater environments such as oceans and seas.

2. Understanding Freshwater Fish: Freshwater fish, on the other hand, inhabit freshwater bodies like rivers, lakes, and ponds.

3. Analyzing the Options:

   • A. Sardine: A marine fish commonly found in ocean waters.
   • B. Rohu: A freshwater fish found in rivers and lakes, particularly in South Asia.
   • C. Mackerel: A marine fish typically found in the ocean.
   • D. Hilsa: Although it is often found in brackish waters, it can also be found in freshwater at certain times.

Conclusion

Based on this analysis, the fish that is not a marine fish is B. Rohu.