Foraminifera are diverse and numerically important in most marine ecosystems and have been since the early Paleozoic. Their ecology and distribution have been studied extensively across the globe (Murray, 1991). They are also important in the geologic record, being one of the best represented fossil organisms since the Cambrian (Culver, 1991; Lipps, 1992). Foraminifera are widely used in ecologic, paleobiologic, paleoceanographic, and paleoclimatic analyses. Yet we know little about their trophic relationships, a fundamental ecologic feature of any group of organism