Question

Pomfret, Mackerel, Tuna, Sardines, and Bombay duck are the popular freshwater fish varieties.
(a) True
(b) False

Answer 1

Freshwater fish are those which spend some or complete of their lives in freshwaters, like rivers and lakes. These environments vary from marine conditions in several ways, the most prominent being the difference in levels of salinity.

Complete answer:
Pomfret fish seen in the Indian and Pacific Oceans and the largest species is recognized as the Atlantic Pomfret. Mackerel is generally seen in the Indian subcontinent. The Indian mackerel is usually found in the dull and coastal waters of Kerala and Maharashtra. Tuna is a saltwater fish located in the Indian Ocean and a significant commercial fish. Tuna is located in the deep waters off the Goa coast and Kerala. Sardine is the second most popular commercial fish in India, mainly existing in northern regions of the Indian Ocean and recognized as Tarali in India. Bombay duck is a lizard fish that survives in the regions of the Indo Pacific. The strange-looking fish is often found in the sea waters off Maharashtra and also a famous food item in certain states of India. Since all the above fishes are the popular marine water fish varieties. Therefore, The given statement is false.

Additional information:
Fishes are cold-blooded vertebrate animals that include approximately 34,400 species seen in freshwater and saltwater across the earth. Fish fall under the superclass Agnatha (jawless fish) and phylum Chordata which covers hagfishes, sharks, bony fishes, and various more. Excluding the fish Opah, all other fishes are cold-blooded vertebrates. The properties of fish are gill slits on the side, skeletal upholding cord, and a tail. The study of fishes is understood as ichthyology, which has produced light on the quality of fish in the world’s food supply.

So, the correct answer is ‘False’.

Note:
If a marine fish is placed in freshwater, the neighboring water moves inside the body of the fish by endosmosis leading to the swelling of its cells and killing the fish. The fish are sensitive even to the smallest variations in the salinity of the water.