Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Nature of the endosymbiosis of the ciliated protozoan Foettingeria species and the sea anemone Anthopleura
Student Author(s): Kamel, Luca Christopher
Pages: 18
Location: Final Papers Biology 175H
Date: June 1980
Keywords: symbiosis at the seashore
Abstract: Foettingeria, a ciliated protozoan, is an endosymbiote which occurs in the gastrovascular cavity of two species of Anthopleura. Its population size is limited by the size of its host. Foettingeria sp. has two locomotion modes, swimming and crawling. Crawling appears to be part of the foraging mode. Feeding is done using a cytostome. The ciliate appear to feed on tiny algal particles as well as zooxanthellae released from the host. While it may derive nourishment from mucous secretions as well as from gut fluids, there is no evidence that Foettingeria sp. harms its host even at high concentrations.