Fig. 3. Scanning electron micrograph of a typical fracture surface of the aboral
epithelium of a frozen-hydrated and superficially etched Galaxea
fascicularis polyp prepared for selected area analyses. The skeleton
(Sk), calicoblastic ectoderm (CE), mesogloea (Mg), aboral gastrodermis (AG)
and extrathecal coelenteron (ETC) are visible. Scale bar, 10 µm.