gibberfish (Gibberichthys pumilus)
A deep-sea fish species. The name is usually written in katakana.
The gibberfish is a rare fish that lives in the deep sea.
Katakana spelling is common for this fish name; usually written in kana.
Kanji spelling exists but is rarely used; the word is usually written in kana.
The name literally means 'mystery fish' (不思議 + 魚), likely referring to its unusual appearance or deep-sea habitat.