Correct option is A
Correct Answer: (a) Alevin
Explanation:
→ The alevin stage refers to newly hatched salmon still carrying their yolk sac.
→ They remain in gravel nests (redds) until yolk absorption completes.
→ Transition to fry occurs once they swim up to the water column.
Information Booster:
→ Alevins depend entirely on yolk for nutrition.
→ Sensitive to sedimentation and oxygen levels.
→ Critical stage for survival and recruitment.
Additional Information (Other Options):
(c) Phyllosoma – lobster larva; (d) Zoea – crustacean larva.