also: あおこどく
noun
poisonous algae bloom; toxic water bloom
Refers to a bloom of algae (often cyanobacteria) that produces toxins harmful to aquatic life and humans. Typically used in environmental or scientific contexts.
アオコ毒が発生した湖では、魚が大量に死んだ。
In the lake where a toxic algae bloom occurred, many fish died.
アオコ毒の影響で水道水が使えなくなった。
Due to the toxic water bloom, the tap water became unusable.
アオコ refers to the water bloom itself (often green algae), while アオコ毒 specifically denotes the toxic variety or the poison produced by such blooms.
Compound of アオコ (water bloom, from 青粉 'green powder') and 毒 (poison). The term is a straightforward description of toxic algal blooms.