How to say "algae" in Japanese

• 藻もCommon
  no-adjectiveCovers algae as actual plants: green growth in a pond, seaweed on rocks, or duckweed on the surface. Use it when you mean the vegetation itself rather than algae as a category.
• 藻類そうるいCommon
  nounTreats algae collectively, as a class of organisms rather than individual strands or patches. It suits science writing and news reports, for instance about algae spreading through a lake.

Choose 藻 when thinking of algae as the plants themselves — green growth, waterweed, or duckweed in the water — and 藻類 when treating algae as a group or category of organisms, as in scientific discussion.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 藻もalgae
• 藻類そうるいseaweeds
• 藻草もぐさwater plant