What is the size of individual corallites?
Measure the largest external diameter on the top of the wall. Measure severals corallites of the colony and calculate a mean.
For sizes at the boundary between two states, validate these two states.
Carefull: the value is not applicable for pluricentric corallites.
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On these photos, there is no undividual corallites (monocentrics), there are only corallites associated, with valleys. For this case, it is impossible to estimate the size of individual corallites, the value is therefore 'not applicable'.
Monocentric and/or pluricentric corallites? | |_ Size of individual corallites (monocentric corallites)