sea pen; sea feather
A marine animal that looks like a quill pen; belongs to the order Pennatulacea.
I saw a sea pen at the aquarium.
Usually written in katakana; the kanji form 海鰓 is rare.
Rare kanji spelling; the second character is not a jōyō kanji.
Compound of 海 (umi, 'sea') and 鰓 (era, 'gill'), referring to the feathery, gill-like appearance of the animal.