Question

Prawns and molluscs are called

• A. Fin fish
• B. Shell fish
• C. True fish
• D. Jaw-less fish

Answer 1

The correct option is B

Shell fish

The correct option is B:

Explanation of the correct option

1. The term Shellfish is used for exoskeleton bearing aquatic invertebrates which are used as a food source.
2. Prawn, Molluscs, and echinoderms are examples of shellfish.
3. They are mostly marine but few are found in freshwater.

Explanation of incorrect options

Option A: Fin fish are either bony fish such as salmon or cartilaginous fish such as a shark. They have streamlined bodies with true fins in comparison to shell fish.

Option B: True fishes are fishes of class Pisces, having fins, gills, and a vertebra.

Option D: Jawless fishes are grouped under Agnatha which means the absence of jaws. Hagfish and Lamprey are two categories of jawless fish.

Final answer: Prawns and Molluscs are called Shellfish.