suji-iruka means "Striped Dolphin" in English.

suji-iruka written with kanji is 条海豚.
These are jouyou kanji 常用漢字, taught in junior high, chuugakkou 中学校.
suji-iruka written with katakana is スジイルカ.
suji-iruka written with hiragana is すじいるか.
Romaji su ji i ru ka
Kanji 海豚
Meaning Streak Dolphin
School Level 小5 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: スジイルカ