Hypselodoris festiva (species of sea slug)
A specific species of colorful sea slug found in Japanese waters. Used in biological and diving contexts.
The Hypselodoris festiva is characterized by its vivid blue pattern.
I found a Hypselodoris festiva while diving.
Katakana spelling is standard for this species name.
Kanji spelling is rare; the word is usually written in kana.
The name アオウミウシ (青海牛) literally means 'blue sea cow', referring to the sea slug's appearance. The exact derivation is uncertain.