The distance from the most remote point of the gill cover to the base of the middle caudal fin ray is called the:

Correct option is B

Correct Answer: (b) Trunk length
Explanation:
→ Trunk length refers to the measurement between the posterior edge of the operculum and the base of the middle caudal fin ray.
→ Used in morphometric studies for species identification and growth analysis.
→ Important for comparing proportional body dimensions.
Information Booster:
→ Morphometrics helps identify stock structure in fisheries.
→ Trunk length varies with age, habitat, and feeding habits.
→ Often used along with head length and standard length.
Additional Information (Other Options):
(a) Snout length – from snout tip to eye/front.
(c) Total length – tip of snout to end of caudal fin.
(d) Absolute length – not a standard morphometric term.