Question

Which of the following is an example of Catadromous fish?
(a) Hilsa
(b) Mystus
(c) Anguilla
(d) Chana

Answer 1

Hint: They are a family of ray-finned fish that contains freshwater eels. They are elongated fish with snake-like bodies(just like eels), their long dorsal, caudal, and anal fins forming a continuous fringe.

Complete answer:
Fishes that migrate from fresh to marine water are known as catadromous fishes.
- Hilsa is an anadromous fish.
-Mystus is a potamodromous fish.
- Anguilla is a catadromous fish.
- Chana is an anadromous fish
The eel is a fish that is 5 cm long for single-jawed eel and 4 m (13 feet) long for moray eel large and small. An adult weighs 30g and weighs more than 25kg. They do not have a rump and most species do not have pectoral fins. The tail and tail are connected to the ends of the tail forming a single ribbon that moves along the animal. Eels swim by making waves that travel along their bodies. You can swim backwards by reversing the direction of the waves. Many eels live in shallow water and dive into sand, mud and rocks. Eel seeds move at night, so you can hardly see them. Sometimes they look as if they live together in a hole or "eel pond". Some eel species also live in the deep waters of the continental shelf and slopes at depths of 4,000 m (13,000 ft).Members of Anguilla not only live in clean water, but return to the sea for reproduction.
Eels begin their life as a simple, flatworm called leptocephalus. Eel larvae live in surface water and feed on sea ice and small particles float in the water. The eel larvae become elves before the lively eel mutation is finally discovered. They go after worms and their habitat. Most eels live in the ocean for life, but eels and freshwater eels are forced to climb and climb obstacles such as beams, dam walls and natural waterfalls.

So, the correct answer is, ‘Anguilla.’

Note:
Anadromous fish are born in freshwater, then migrate to the ocean as juveniles where they grow into adults before migrating back to freshwater to spawn. Catadromous fish are born in saltwater, then migrate into freshwater as juveniles where they grow into adults before migrating back to the ocean to spawn.