Three days later, the scientists decided to seal the jar. The fleas kept jumping in an attempt to escape, but they hit the lid, stopping them abruptly. The jar remained sealed for three days.

If left untreated, fleas can stick around for a long time causing trouble. Here's how to get rid of fleas in your home, yard, and on your pet.

Water fleas as 'canaries in a coal mine' offer key to managing chemical pollution. ScienceDaily. Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2022 / 09 / 220928113004.htm.