A fish that is devoid of any scales is?

Correct option is A

Catfish is a type of fish that is typically devoid of scales. Unlike most fish, which have scales to protect their skin, catfish have smooth, scaleless skin often covered by a mucous layer that aids in protection and helps them glide through water. Catfish also possess barbels (whisker-like structures) near their mouths, which are sensory organs used for detecting food.

The absence of scales is a distinct feature that sets catfish apart from other types of fish such as carp and mullet, which have scales.

Information Booster

• Why Catfish Lack Scales:
  • They have evolved to live in muddy or murky environments where scales are less critical for protection.
  • Their slimy skin provides a barrier against pathogens and predators.
• Other Scaleless Fishes:
  • Eels and some species of sharks also lack scales.
• Common Species of Catfish: Channel catfish, blue catfish, and flathead catfish.
• Habitat: Found in freshwater and sometimes brackish environments worldwide.

Additional Knowledge

• (a) Cat fish – Correct. Catfish are scaleless, relying on their smooth skin and mucous layer for protection.
• (b) Dog fish – Incorrect. Dogfish, a type of shark, has placoid scales (dermal denticles), not smooth skin.
• (c) Carp – Incorrect. Carp are freshwater fish that have scales covering their bodies.
• (d) Mullet – Incorrect. Mullets are also scaled fish commonly found in marine and freshwater environments.