A free-floating larval form of certain marine worm-like creatures, characterized by ring-like ciliated structures (hair-like organelles) that radiate like rays.
From Greek 'aktis' (ray) + 'trochos' (wheel). This zoological term describes a specific type of larva found in marine biology.
Actinotrochae are absolutely wild—they're the larval stage of phoronids and some other marine worms, and they drift around the ocean with their crown of spinning, ray-like cilia making them look like tiny microscopic fireworks!
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