Question

Water bloom is generally caused by

• A. green algae
• B. blue-green algae
• C. bacteria
• D. Hydrilla

Answer 1

Answer: (B)

blue-green algae

Answer 2

Water blooms are formed by the growth of some microscopic or semi-microscopic algae such as Anabaena, Arthrospira, Nodularia, Nostoc etc. Water blooms may be harmful because they are indirectly responsible for fish mortality due to depletion of oxygen.