The Heteractis magni¢ca assemblage at the tip of the Sinai Peninsula was examined. The actinian size,
location, and number of resident anemone¢shes were recorded. The anemones were found at depths down
to approximately 40m and the sizes of clustering H. magni¢ca and clusters were positively correlated with
depth. The shallow waters of the anemone assemblage contained few mainly small, solitary actinians.
There seemed to be a tendency for solitary actinians to cluster once they reached a certain size-range.
The resident anemone¢shes Amphiprion bicinctus and Dascyllus trimaculatus were present in very large
numbers (approximately 250 and 1800 respectively) and the A. bicinctus home range size was positively
correlated with depth.