Flea
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The Flea is a vermin flea that Sandy picked up while visiting Texas and brought to Bikini Bottom. The flea can be noted for being able to reproduce in rapid succession and causing an infestation within Sandy's Treedome. The flea caused pain to SpongeBob, Patrick, and Sandy by continously biting the three. The flea's attacks are eventually countered by Sandy's flea proof collare. However, the collar was destroyed during the multiplication of the fleas. The flea's only appearance is in the episode, A Flea in Her Dome.