Which of the following is the respiratory pigment in fishes?

Correct option is A

Correct Answer: (a) Hemoglobin
Explanation:
→ Hemoglobin is the primary oxygen-carrying pigment in most fishes, located in red blood cells.
→ Binds oxygen efficiently for transport to tissues.
→ Gives blood its characteristic red color.
Information Booster:
→ Some deep-sea fishes show modified hemoglobins for low-oxygen environments.
→ A few Antarctic species lack hemoglobin (icefishes).
→ Structure similar to that in mammals but adapted to aquatic respiration.
Additional Information (Other Options):
(b), (c), (d) occur in various invertebrates, not typical fishes.