nezumi-iruka means "Harbor Porpoise" in English.

nezumi-iruka written with kanji is 鼠海豚.
This word contains non-jouyou kanji 常用漢字.
nezumi-iruka written with katakana is ネズミイルカ.
nezumi-iruka written with hiragana is ねずみいるか.
Romaji ne zu mi i ru ka
Kanji 海豚
Meaning Rat Dolphin
School Level 小2,

Orthography Notes

  • iruka is a jukujikun 熟字訓 reading for 海豚 in this word. That is: those kanji are only read that way when they come together like that.

Further Reading

Wikipedia: ネズミイルカ