... Mucous sheets have been reported in Porites astreoides, P. divaricata, P. furcata, and P. porites in Florida and the Caribbean (Bak and Elgershuizen, 1976;Coffroth, 1985;Ducklow and Mitchell, 1979;Edmunds and Davies, 1986;Glasl et al., 2016;Lewis, 1973;Marcus and Thorhaug, 1981), Porites cylindrica from Japan (Kato, 1987), Porites compressa from Hawaii (Krupp, 1984;Marcus and Thorhaug, 1981), along with P. lutea, P. lobata, P. australiensis and P. murrayensis on the Great Barrier Reef of Australia (Coffroth, 1988;Coffroth, 1990;Stafford-Smith and Ormond, 1992). Similar sheet like structures have also been reported in the corals Diploastrea heliopora, Pachyseris speciosa, Mycedium elephantotus, Pectinia lactuca, P. paeonia, Turbinaria peltata and T. mesenterina (Sofonia and Anthony, 2008;Stafford-Smith and Ormond, 1992), Heliopora coerulea (Lewis, 1973), and in other groups such as gorgonians, alcyonaceans and zoanthids (Coffroth, 1988;Rublee et al., 1980). ...