Question

Herbivorous carps are
A. Labeo and Hilsa
B. Catla and Magur
C. Shark and Singla
D. All of the above

Answer 1

Hint: Carp is a species of oil containing freshwater fish belonging to the family cyprinidae. It serves as a good source of food for humans. The herbivorous carp feed on the aquatic plants.

Complete Answer:
To solve this question, we must know about the food habits of the options given in the question.
1. Hilsa - It is known as the Queen of fish. It is found in India and Bangladesh. It is a herbivorous carp which feeds on aquatic plants.
2. Labeo - These are silver coloured carp which feed on algae and decomposing vegetation. The mouth of labeo is adapted for eating aquatic vegetation.
3. Catla is a fresh water surface feeder carp and it preferably feeds on zooplankton.
4. Magur are also known as cat fishes and walking catfish, the head of these fishes are larger and mouth is present on the ventral side. They are benthic. It consumes a wide variety of prey including larvae of other fishes and eggs, they are considered as carnivores.
5. Shark-Shark is the cartilaginous fish belonging to the class Chondrichthyes. They feed on small and big fishes and other aquatic animals.

So the answer is A. Labeo and Hilsa.

Note: Hilsa is mainly found in tropical areas of the Indo-Pacific region, especially in Bangladeshi waters, they are considered as very important in these areas. Hilsa mainly feed on diatoms, green algae and crustaceans . Chlorophyceae , Cyanophyceae , Copepoda , Cladocera Rotifera and Protozoa are found in the gut contents of hilsa . This proves that Hilsa is a herbivore.