. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2345. Figure 6. Light micrographs of newly settled polyps of Fungia scu- iiirin. (A) A/ooxanthellate polyp (m = mouth). (B) Zooxanthellate polyp. Zooxanthellae appear as brown spheres in the polyp. The two polyps shown in this figure were settled in the same dish, adjacent to one another. Contaminating diatoms appear as small ellipses around the polyps. Polyp diameter = 100 jxm. exhibit feeding behavior that leads to the ingestion of zoo- xanthellae. It will be interesting to determine whether other species that produce a fe
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2345. Figure 6. Light micrographs of newly settled polyps of Fungia scu- iiirin. (A) A/ooxanthellate polyp (m = mouth). (B) Zooxanthellate polyp. Zooxanthellae appear as brown spheres in the polyp. The two polyps shown in this figure were settled in the same dish, adjacent to one another. Contaminating diatoms appear as small ellipses around the polyps. Polyp diameter = 100 jxm. exhibit feeding behavior that leads to the ingestion of zoo- xanthellae. It will be interesting to determine whether other species that produce a feeding planula larva acquire zoo- xanthellae in the same manner as shown for F. scutaria and A. elegantissima. Both endodermal and ectodermal cells incorporated zooxanthellae within 1 h after larvae were exposed to zoo- xanthellae. The appearance of zooxanthellae in ectodermal tissue was surprising because zooxanthellae phagocytosed by endodermal cells would not be expected to be trans- ported into tissues where they do not ultimately reside. We did not determine how the zooxanthellae entered the ecto- derm. Future work will include long-term sampling of newly infected larvae to investigate the fate of the ectoder- mal zooxanthellae. Horizontal transmission of symbionts would appear to be disadvantageous for obligately symbiotic species because of 100. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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