Question

How do aquatic animals respire?

• A. Aquatic animals do not respire.
• B. Aquatic animals do not require air for respiration.
• C. Aquatic animals use water for respiration.
• D. Aquatic animals use dissolved air in water.

Answer 1

The correct option is D

Aquatic animals use dissolved air in water.

Air is present at every place where there is life. In rivers, seas, oceans, and other water bodies, air is present. Though air is not available in the same manner as it is on the surface of the earth, but it is present in dissolved form. Yes, air is present in water bodies in dissolved form and aquatic animals use their gills for extracting air dissolved in water. Some aquatic animals may even use their skin for extracting air from water.