Fig. 2. Images of genetically identical colonies of Podocoryna carnea growing on 18mm diameter glass coverslips after 30 days of differential feeding (A, control; B, differentially fed). Polyps are bright and circular; stolons are darker and web-like; unencrusted ‘inner’ areas of coverslip appear dark. The triangular patch of very dense polyp and stolon growth on the right of colony in B is the ‘fed’ area; the remainder of this colony was not directly fed.

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