(Length: 1/32″ – 1/16″) Fleas are small, hard-bodied, wingless insects with a flattened body and legs adapted for jumping onto a host. The cat flea, most commonly encountered in Florida, seeks mammals for the blood meal needed to sustain them. They can be a direct health hazard, transmitting disease and tapeworm. Humans are often attacked when other food sources aren’t available. Their bite leaves a red, itchy spot on the skin. Their saliva is irritating to the host, causing dermatitis and hair loss in allergic animals.