Ctenocephalides canis, commonly known as the dog flea, is a small parasitic insect that primarily infests dogs but can also affect other animals and humans. These fleas are typically brown and measure about 1-3 mm in length. They feed on the blood of their hosts, which can lead to discomfort and health issues for the infested animals. The life cycle of Ctenocephalides canis includes four stages: egg, larva, pupa, and adult. Adult fleas can reproduce quickly, laying hundreds of eggs in their lifetime. Effective control measures include regular grooming, vacuuming, and the use of flea treatments, which can help prevent infestations in pets and homes.