A hidden or concealed mouth-like opening or aperture in an organism, particularly in certain marine or microscopic creatures.
From 'crypto-' (hidden) and Greek 'stoma' (mouth), describing organisms with oral openings that are not readily visible or are obscured by structural features.
Many sea creatures have cryptostomas—mouths so small or hidden that they're nearly impossible to spot, which helps them hunt prey by surprise while remaining almost invisible themselves!
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