Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss?
Correct answer: C. Bony fishes
- A. Hagfish
- B. Fresh water fishes
- C. Bony fishes
- D. None of these
Explanation
Marine bony fishes drink seawater because they lose water by osmosis, and their kidneys produce concentrated urine to remove excess salts while conserving water. Students may choose hagfish because it is a marine fish, but hagfish have body fluids closer to seawater and do not show the typical seawater-drinking pattern of marine bony fishes.
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