Translation guide
This guide covers how to express 'aquatic' in Japanese, meaning relating to water, living or growing in water, or taking place in water. It focuses on common adjectives and compounds used in everyday and scientific contexts.
Describing organisms that live in water, such as aquatic plants or aquatic animals.
The most common and general adjective meaning 'aquatic' for living things. Used in biology and everyday language.
水生植物は池や湖で育ちます。
Aquatic plants grow in ponds and lakes.
水生動物には魚やカエルが含まれます。
Aquatic animals include fish and frogs.
Literally 'underwater', often used to describe organisms that live submerged. Can also mean 'submerged' or 'underwater' in general.
水中の微生物を観察する。
Observe aquatic microorganisms.
A more technical or literary term for 'aquatic', often used in biology or formal writing. Less common in daily speech.
水棲生物の多様性を研究する。
Study the diversity of aquatic organisms.
Describing activities, sports, or environments that take place in or on water.
Means 'on the water' or 'aquatic' for sports and activities that happen on the surface, like boating or water skiing.
水上スキーは夏に人気のスポーツです。
Water skiing is a popular summer sport.
Used for activities that take place underwater, like diving or underwater photography.
水中写真を撮るのが趣味です。
Taking underwater photos is my hobby.
A simple and broad term meaning 'water-related'. Can be used in many contexts but is less specific than compounds.
水の事故に注意してください。
Be careful of water accidents.
Describing items or equipment made for use in water, such as aquatic gear or waterproof devices.
Means 'for underwater use'. Commonly used for cameras, watches, and other equipment.
水中用カメラを持ってダイビングに行く。
I take an underwater camera when I go diving.
Means 'waterproof'. Used for items that resist water, like watches or bags. Not exactly 'aquatic' but often used in similar contexts.
この時計は防水です。
This watch is waterproof.
Both mean 'aquatic' for living things. 水生 (すいせい) is the standard term in everyday and scientific contexts. 水棲 (すいせい) is more literary or technical, often used in biology texts. They share the same reading but different kanji.
The loanword アクアティック (akuatikku) exists but is rarely used in natural Japanese. It may appear in brand names or titles but sounds unnatural in conversation. Stick to native Japanese compounds.
その池は水生生物でいっぱいだ。
The pond is full of aquatic life.
彼女は水生生態系を研究している。
She studies aquatic ecosystems.