A zoological group or classification of crustaceans or similar marine organisms with naked or unsheathed antennae or appendages.
From Greek gymnos (naked) + kerat- (relating to horns or antennae). The taxonomic term emerged in zoology to classify organisms by antenna characteristics.
Even the tiniest ocean creatures got sorted by whether their 'horns' (antennae) were covered or bare—showing that ancient Greeks' obsession with nakedness literally shaped modern scientific classification!
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