How large can an individual bryozoan zooid grow?

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Eurystomella bilabiata, a moss animal from the Order Cheilostomata. — moss animal *Eurystomella bilabiata*, a moss animal from the Order Cheilostomata.

Individual bryozoan zooids are typically very small, rarely exceeding one millimetre in length. While the colonies they form can vary significantly in size—ranging from single-zooid structures less than one millimetre in height to large masses reaching a metre or more in circumference—the individual modules themselves remain microscopic in scale.12