Translation

madara-iruka means "Pantropical Spotted Dolphin" in English.

madara-iruka written with kanji is 斑海豚.
These are jouyou kanji 常用漢字, taught in junior high, chuugakkou 中学校.
madara-iruka written with katakana is マダライルカ.
madara-iruka written with hiragana is まだらいるか.
Romaji ma da ra i ru ka
Hiragana
Katakana
Kanji 海豚
Meaning Spots 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.

Trivia

  • Madara iru ka? would be a way to ask if someone called Madara is around.

Further Reading

Wikipedia: マダライルカ