noun
aquatic life survey; underwater biological observation
Refers to systematic observation or survey of aquatic organisms, often in scientific, educational, or environmental contexts.
環境調査の一環として水中生物観察を行った。
We conducted an aquatic life survey as part of the environmental study.
子供たちは川で水中生物観察を楽しんだ。
The children enjoyed observing underwater life in the river.
Compound of 水中 (underwater), 生物 (living things), and 観察 (observation).