A genus of starfish found in deep ocean waters, characterized by a large central disk and long arms.
From Greek 'astron' (star) and 'medes' (ruler or protector), combining classical starfish nomenclature with celestial symbolism. The term emerged in 19th-century marine taxonomy.
Scientists named this starfish after both stars and ancient Persian rulers—a pattern showing how early naturalists loved mixing astronomy with history when naming creatures they'd never seen before!
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