Pink spots on Porites: not always a coral disease
- 1.3k Downloads
KeywordsCoral Coloni Yemen Coral Growth Spot Disease Coral Disease
Bright pink spots or lines can appear on the surface of Porites due to different mechanical disturbances and subsequent recovery (Schuhmacher 1992; van Woesik 1998). The pink spot disease (Aeby 1993) is an infection of Porites by trematode larvae manifesting as pink swollen nodules and ultimately leading to predation by fish. Similar nodules, between 3 and 5 mm in diameter, were observed in south Yemen during a long-term coral monitoring.
The monitoring was conducted twice a year between November 2006 and March 2009 and considerable temporal variation in pink spots density was observed on the same colonies (Fig. 1d–i). During the whole period, the coral growth did not appear limited and no preferential predation of swollen polyps by fish was observed.
Our observations suggest that field records of pink spots on Porites may not always be the result of a disease caused by a trematodiasis type of infection. Therefore, an initial verification of a disease such as Porites trematodiasis is recommended before assigning a disease name.
The authors thank Yemen LNG, TOTAL SA and Creocean. Study supported by Creocean under Yemen LNG funds.
- Schuhmacher H (1992) Impact of some corallivorous snails on stony corals in the Red Sea. Proc 7th Int Coral Reef Symp 2:840–6Google Scholar