ribbon worm; nemertean
Refers to any worm of the phylum Nemertea, often found in marine environments. The name comes from its long, ribbon-like shape.
See also: 紐形動物
I found a ribbon worm on the beach.
ヒモムシは細長い体をしている。
Ribbon worms have a long, slender body.
Katakana spelling is common for this organism; usually written in kana.
Kanji spelling is possible but rarely used; the word is usually written in kana.
From 紐 (ひも, 'string, cord') + 虫 (むし, 'worm, insect'), referring to the worm's long, ribbon-like shape.