The text claims that a snail, not a crocodile or shark, has the most teeth—about 25,000, which are only visible under a microscope.

Infact verdict: Mostly True (66/100).

The claims regarding snails and their teeth have varying support from available evidence. The presence of thousands of microscopic teeth in snails is well-documented and scientifically verifiable. Although a variety of snails have tens of thousands of teeth arranged in a radula, the specific number can vary based on species, and the claim that they always have about 25,000 teeth lacks strong consensus, though it is possible for some species. The assertion that snail teeth are visible only under a microscope is consistently supported by multiple sources. As for the claim that snails have more teeth than other animals like crocodiles or sharks, evidence indicates that snails are indeed among the organisms with the most teeth, though the umbrella slug may have more overall in a lifetime.