This species was studied in the intertidal zone between 1964 and 1972, partly at Seaquarium Flats and partly at nearby Bear Cut, in Biscayne Bay, Florida. Some additional material was supplied by dredging nearby. Spawning is irregular, but there are probably typically two spawning periods
in the year. Settlement appears to be below low water with subsequent movement into the intertidal zone. A length of about 15 mm is reached in 1 year, 25 mm in 2 years and 30 mm in 3 years. Spawning and tissue weights are very much more erratic at Bear Cut than on the Seaquarium Flats. At
the latter, tissue weight was negatively correlated with deviation of temperature from the long term mean for the month in question and for the previous month. Cercarial infection increased with size and was up to 20% in large individuals.
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