Getting rid of fleas takes time.
cat flea
sand flea; chigoe; chigger
springtail
phorid fly
Standard kanji spelling for 'flea'. This kanji is not a Jōyō kanji, so it may be written in kana in some contexts.
Hiragana spelling is common in everyday writing, especially for learners or when avoiding the non-Jōyō kanji.
Katakana spelling is common in biological or veterinary contexts, and when the kanji is considered difficult.
The word のみ is native Japanese. The kanji 蚤 is a Chinese character adopted for its meaning 'flea'. The historical derivation of the Japanese word is uncertain.