Bail-out of the polyp from the skeleton of spats in the scleractinian coral <i>Acropora tenuis</i>

TL;DRAbstract

Unlike tight association between the polyp and skeleton in scleractinian corals, there are reports on bail-out of polyps from the colony in Seriatopora (Sammarco 1982), expulsion of polyp with calices in Favia and Oculina (Kramarsky-Winter et al. 1997), and also reversal to a motile palnula form from the initial polyp in Pocillopora (Richmond 1985). Here we report polyp bail-out from spats in Acropora. Hundreds of primary polyps of Acropora tenuis were prepared in culture dishes following Iwao et al. (2002) from gametes collected in the field, infected with zooxanthellae from the giant clam and reared at 25 with daily seawater change.

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