Translation

The Japanese word for "Jellyfish" is kurage 海月.

Romaji ku ra ge
Hiragana
Katakana
Kanji 海月
School Level 小2, 小1

Loan-word

The word "Jellyfish" katakanized would be jerīfisshu ジェリーフィッシュ.
Romaji je rii fi sshu
Katakanaジェフィシュ
Hiraganaじぇふぃしゅ
Meaning Jelly Fish

Trivia

  • Despite the name, a Jellyfish isn't a fish.[1]

Further Reading

Wikipedia: Jellyfish (クラゲ)
  1. Is a jellyfish a fish? - oxforddictionaries.com, accessed .
Swordfish, gyorui 魚類.