In fish production, which of the following comes under the category of shellfish?

Correct option is D

The correct answer is (D) Molluscs

Explanation:
• In fisheries and aquaculture, aquatic organisms harvested for consumption are generally divided into finfish (true fishes with gills and fins) and shellfish.
• "Shellfish" is a culinary and fisheries term for aquatic invertebrates that typically possess an exoskeleton or shell.
• Shellfish primarily include two major biological categories: Crustaceans (such as prawns, shrimp, crabs, and lobsters) and Molluscs (such as oysters, clams, mussels, squids, and octopuses).
• Therefore, molluscs strictly fall under the category of shellfish.

Information Booster:
• Mariculture vs Aquaculture: The farming of marine (saltwater) organisms like oysters and marine fish is termed mariculture, which is a specialized branch of aquaculture.
• Pearl Culture: Certain bivalve molluscs (like pearl oysters) are highly valued in the aquaculture industry not just for food, but for cultivating precious pearls.

Additional Knowledge:
• Option A (Silver carp): This is a species of freshwater finfish, widely cultivated globally in inland aquaculture ponds.
• Option B (Bombay duck): Despite its unusual name, the Bombay duck (Harpadon nehereus) is actually a species of marine finfish, highly popular in regions around Mumbai.
• Option C (Tuna): Tuna is a large, commercially vital, saltwater marine finfish belonging to the mackerel family.