Twitter Post Transcription
Deb JJ Lee (they) @jdebbiel · 22h ⋯
Learned that sea urchins have a single eye and now I’m physically ill
[Two photos, the first showing a sea urchin and the second more zoomed in on a small orange part in the middle of its body.]
Readers added context
That is a butthole.
inaturalist.org/guide_taxa/292…
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“echi(n)” means spiny or prickly, so echinacea, echidna, and echinoidea are all prickly