Parazoanthus sp. growing over a hydroid in the Solomon Islands. J. Sprung
Prolific asexual reproduction results in the typical compact growth form of these Zoanthus spp. photographed in an aquarum. J. C. Delbeek genus. It is not uncommon to find colonies several meters in diameter on reef flats; these can sometimes even he formed by hundreds of clones of a single polyp (Mather and Bennett, 1993). Extensive growths of Zoanthus spp. for example, are often found along shorelines, literally covering rocks with thick carpets of polyps (pers. obs. Delbeek and Sprung). Asexual reproduction via fragmentation is also common. Clumps of polyps or individuals torn from the substratum can easily reattach and form new colonies. It is these characteristics, coupled with their rapid growth that allows many of the genera to be propagated quite easily in captivity (see chapter six).
Sexual reproduction has not been well studied in the Zoanthidea but a few interesting facts have come to light. Studies of Zoanthus,
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