In which of the following fishes is lateral line incomplete?

Correct option is A

Correct Answer: (a) Pomacentridae
Explanation:
→ Fishes of the family Pomacentridae (damselfishes) have an incomplete lateral line, meaning the canal does not extend the full length of the body.
→ This is a distinct morphological feature used in identification.
→ Found in coral reef ecosystems.
Information Booster:
→ Lateral line detects vibrations and water movement.
→ Incomplete lateral lines occur in several reef-associated fishes.
→ Useful adaptation for complex structural habitats.
Additional Information (Other Options):
(b) Sciaenids – complete lateral line, often extending onto caudal fin.
(c) Serranids – complete lateral line.
(d) Carangids – complete lateral line.