Colony In the mangroves near the dock by Budget Marine. Fast moving when disturbed. Bell of largest approx 3/4" with 12 1-2" tentacles. Smaller specimens have shorter clubbed tentacles. There were easily 5-10 specimens per square foot varying in size. Swimming at surface in approx 2 feet of water, within 1 foot of edge of mangrove roots and all amongst mangrove roots.