The scientists found both were composed of a fibrous material that contained many stinging cells called spirocysts, which belong exclusively to the branch of aquatic invertebrates known as cnidarians.
—
Adam Kovac,
Scientific American,
23 Apr. 2026
But closer analysis revealed it was made of fibrous layers packed with stinging cells, pointing to a connection with cnidarians, the group that includes corals and anemones.
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