Ringworm is actually a fungal infection, and not a type of actual worm. (second-opinion-doc.com)
So now that I was putting actual worms and grasshoppers in the pool, maybe some fish would start showing up. (redeeminggod.com)
However, the researchers didn't use actual worms, but an active nematic composed of flexible filaments covered with microscopic engines that are constantly converting energy into motion. (sciencedaily.com)