Uji antifeedant ekstrak kasar Timun Laut Synaptula reticualata (Semper, 1868) terhadap ikan karang di Perairan Pulau Pramuka, Taman Nasional Kepulauan Seribu, DKI Jakarta = Antifeedant Assay of Sea Cucumber Synaptula reticulate (Semper,1868) Crude Extract on Reef Fishes at Pramuka Island Waters, Seribu Islands National Park, DKI Jakarta