Translation

jirafu-anterōpu means "Gerenuk" in English.
It's a katakanization, a loan-word.
It comes from English, "Giraffe Antelope."

jirafu-anterōpu is normally written with katakana, as ジラフアンテロープ.
jirafu-anterōpu written with hiragana is じらふあんてろーぷ.
jirafu-anterōpu does not have kanji.
Romaji ji ra fu a n te roo pu
Katakana
Hiragana
Meaning Giraffe Antelope

Orthography Notes

Further Reading

Wikipedia: ジェレヌク (Gerenuk)