Question:
Interrupted lateral line and a single nostril on each side of the snout are the characteristics of which of the following family?
Interrupted lateral line and a single nostril on each side of the snout are the characteristics of which of the following family?
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Family Cichlidae Key Traits: 1. SINGLE nostril on each side of snout, 2. INTERRUPTED (two-part) lateral line, 3. Pearlspot (Etroplus) & Tilapia.
Updated On: Sep 7, 2026
- Nandidae
- Cichlidae
- Carangidae
- Mullidae
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Diagnostic ichthyological family characters: Family Cichlidae (cichlids/tilapias) uniquely combines a single naris (nostril) on each side with a two-part discontinuous (interrupted) lateral line.
Step 2: Detailed Explanation:
Diagnostic taxonomic characters of Family Cichlidae (e.g., Oreochromis mossambicus, Oreochromis niloticus, Etroplus suratensis):
1. Single Nostril: A single nasal opening (naris) on each side of the snout (unlike most teleosts which have two paired nostrils on each side).
2. Interrupted Lateral Line: The lateral line system is divided into two distinct, discontinuous overlapping sections: an anterior upper dorsal branch and a posterior lower mid-lateral caudal branch.
3. Fused lower pharyngeal bones into a single tooth-bearing triangle.
Step 3: Final Answer:
Therefore, these characteristics define Family Cichlidae, matching option (B).
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