Can fleas see bacteria?

Fleas are small. Bacteria too. Can fleas see bacteria?

Asker: Cill, 8 years old


G’day Ciel,

No! Fleas are small, but they are still enormously larger than bacteria. It’s not because you’re big or small that you can see big or small things. An elephant and a mouse both see the same little things because they have equally good eyes, but bacteria are certainly not among them. You need a very good microscope to see them.



Answered by

Dr Rudy Jocque

Arachnology Zoology Biodiversity

Royal Museum for Central Africa
Leuvensesteenweg 13 3080 Tervuren


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