Shark: The Cartilaginous Fish Example

This question asks to identify a cartilaginous fish from the given options. Cartilaginous fish belong to the class Chondrichthyes, characterized by skeletons made primarily of cartilage rather than bone.

Analyzing Fish Types

• Shark: Sharks are well-known examples of cartilaginous fish. Their skeletons are composed entirely of cartilage, not bone.
• Rohu: Rohu (Labeo rohita) is a common freshwater fish belonging to the carp family. It is a bony fish (class Osteichthyes), meaning its skeleton is made of bone.
• Salmon: Salmon are anadromous fish, also belonging to the class Osteichthyes. They possess bony skeletons.
• Tuna: Tuna are large, fast-swimming marine fish, also classified as bony fish (Osteichthyes) due to their bone structure.

Conclusion

Based on the definition, the only cartilaginous fish among the options provided is the Shark.