Tampa Bay is dotted with some 40 dredged holes — deeper areas created by excavating sediments for urban development. While some are inferior habitat due to lower oxygen levels or an accumulation of toxins in sediments; others are prized by fish and other animals that use them to rest, hide, or as warm water refuges. Scientists monitored fish, water quality, sediments and bottom dwelling organisms, like worms and crustaceans, in and around 11 holes during a 2016/17 study. They recommended partial or complete filling of four holes (Bay Point, MacDill Docks, Ft. DeSoto and Culbreath South) to improve habitat characteristics. The remaining holes are providing adequate to excellent habitat and were recommended to remain unfilled.
