attenuated spider fish
A deep-sea fish, Bathypterois atricolor, known for its elongated fin rays. Scientific/domain-specific term.
An attenuated spider fish was collected during the deep-sea survey.
Kanji spelling exists but is rarely used; the word is usually written in kana.
Compound of 糸引 (いとひき, 'thread-pulling') + 鰯 (いわし, 'sardine'), referring to the fish's long, thread-like fin rays. The exact derivation is uncertain, but the name is descriptive of its appearance.