An organism or body part that has a mouth or opening with ray-like structures arranged around it, especially in marine creatures.
From Greek 'aktis' (ray) + 'stoma' (mouth). Used in zoology to describe the oral structures of radial animals like sea anemones and jellyfish.
Sea anemones are perfect examples of actinostomes—their tentacles radiate out like rays around the central mouth, and if you look closely, the whole arrangement is almost perfectly symmetrical, like a living geometric pattern!
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