These are Lido Beach jetties on the Gulf on Mexico, Sarasota, Florida, on September 21, 2000.  Two Perna viridis collected from the southern jetty ranged from 27.3 to 42.9 mm (.39 to 1.67 inches).  These specimens were found in the outer edge of the jetty which receives high wave energy and sandblasting.  They showed irregular growth and coloration.  On October 5, 2000 one P. viridis was found on the south jetty. It was 39 mm (1.53 inches).
	This is Lido Beach, north jetty rocks on the Gulf on Mexico, Sarasota, Florida, September 21, 2000.  Five Perna viridis collected here ranged from 12.5 to 18.0 mm (0.49 to 0.70 inches).  They were collected in high energy intertidal zone which experiences sandblasting.  All were collected in "protected crevices or tidal pools on the rocks - all in areas receiving the most wave impact.