noun
tubifex worm
A small, reddish aquatic worm often used as fish food or found in polluted water.
イトミミズは熱帯魚の餌としてよく使われる。
Tubifex worms are often used as food for tropical fish.
川底にイトミミズがたくさんいる。
There are many tubifex worms on the riverbed.
Rare kanji form using 蚯蚓 for earthworm.
Search-only kanji form; not a standard spelling.
ミミズ is a general earthworm, while イトミミズ is a specific aquatic species.
Compound of 糸 (ito, 'thread') and ミミズ (mimizu, 'earthworm'), referring to its thin, thread-like appearance.