CCHMN sites 042021 CAL424 26.61037313, -81.8954834 1.5 m no bottoms CAL388 26.52486573, -81.95922988 1.2 m no bottoms CAL412 26.57914922, -81.9244891 1.2 m no bottoms CAL387 26.52808848, -81.96809961 2.1 m bottoms CAL448 26.66966101, -81.86215615 1.5 m no bottoms