Marine fishes drink water in order to compensate for the:

Correct option is D

Correct Answer: (d) Water loss
Explanation:
→ Marine fishes lose water osmotically because seawater is hypertonic to their body fluids.
→ To maintain hydration, they actively drink seawater and excrete excess salts through gills and kidneys.
→ This mechanism helps them avoid dehydration.
Information Booster:
→ Chloride cells in gills excrete Na⁺ and Cl⁻.
→ Marine teleosts produce small volumes of concentrated urine.
→ Essential adaptation for survival in high-salinity environments.
Additional Information (Other Options): Marine fishes do not face salt loss; rather, they gain salt.