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A cartilaginous fish with an operculum i...

A cartilaginous fish with an operculum is

A

Scoliodon

B

Chimaera

C

Torpedo

D

Trygon

Text Solution

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The correct Answer is:
To solve the question "A cartilaginous fish with an operculum is," we need to analyze the characteristics of the given options and the definition of operculum in relation to cartilaginous fishes. ### Step-by-Step Solution: 1. **Understand Cartilaginous Fish**: Cartilaginous fishes belong to the class Chondrichthyes, which includes sharks, rays, and skates. Their skeletons are primarily made of cartilage rather than bone. 2. **Identify the Operculum**: The operculum is a bony flap that covers and protects the gills. It is a characteristic feature of bony fishes (class Osteichthyes), but it is not typically found in cartilaginous fishes. 3. **Analyze the Options**: - **Scoliodon**: This is a type of shark, which is a cartilaginous fish and does not have an operculum. - **Chimera**: This is a type of cartilaginous fish that does have an operculum, making it an exception among its class. - **Torpedo**: This is another type of cartilaginous fish (electric ray) and does not have an operculum. - **Trigon**: This refers to stingrays, which are also cartilaginous fishes and do not possess an operculum. 4. **Conclusion**: Among the options provided, the only cartilaginous fish that has an operculum is **Chimera**. ### Final Answer: The cartilaginous fish with an operculum is **Chimera**. ---
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