Question

Fiddler crab is the inhabitant of

• A. Upper stretches of river
• B. Mud flat
• C. Rocky shore
• D. Deep sea cave

Hint:

Fiddler crabs are sexually dimorphic; males possess one enormously enlarged claw (used for courtship signaling and combat) that resembles a fiddle, while females have two small, equal-sized feeding claws.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Intertidal ecosystems are highly dynamic zones where organisms are adapted to live in mud, sand, or rocks exposed during low tides.

Step 2: Detailed Explanation:
Fiddler crabs (genus Uca) are small, semi-terrestrial decapod crustaceans.
They are classic, abundant inhabitants of intertidal mud flats, salt marshes, and sandy-muddy estuaries.
They dig deep burrows in the soft mud to protect themselves from predators and desiccation during high tides and emerge during low tides to feed on organic detritus.

Step 3: Final Answer:
Fiddler crabs inhabit mud flats, which corresponds to option (B).