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World's Largest Snails: Giant African vs. Ancient Ammonites

4/5/2025

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Summary

Story summary

The giant African land snail reigns as the largest terrestrial snail, boasting a remarkable shell size of 27.3 cm. In contrast, the Australian trumpet shell, a marine marvel, can reach an astonishing 72.2 cm. Meanwhile, ancient ammonites, relatives of octopuses, once grew over 2 meters long, though they aren’t classified as snails.

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Story summary

The giant African land snail reigns as the largest terrestrial snail, boasting a remarkable shell size of 27.3 cm. In contrast, the Australian trumpet shell, a marine marvel, can reach an astonishing 72.2 cm. Meanwhile, ancient ammonites, relatives of octopuses, once grew over 2 meters long, though they aren’t classified as snails.