The demosponge Pleroma menoui (order Lithistida, suborder Trienosina (= Desmophorina), family Pleromidae), collected in the Coral Sea south-east of Noumea at a depth of 500 m, is proven here to contain the novel alkaloids ethyl 6-bromo-3-indolcarboxylate and 3-hydroxyacety1-6-brom oindole. © 1989, Verlag der Zeitschrift. All rights reserved.