Relating to bryozoa (small marine animals) that have a comb-like or slit-like mouth opening for feeding.
From Greek 'kteis' (comb) combined with 'stoma' (mouth) plus the Latin suffix '-ous.' This technical term emerged in the 19th century in marine biology.
Bryozoa are among nature's most successful colonizers—they form the crusty patterns you see on seaweed and rocks—and their ctenostomatous mouths allow them to be precise feeders in the competitive microscopic ocean world!
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