New York City donated old "Redbird" subway cars to create one of the most popular artificial reefs, now called the Redbird Reef. .. According to Delaware Fish and Wildlife, their monitoring studies have shown a 400-fold increase in the amount of plankton and small baitfish in the areas surrounding artificial reefs.
Delaware's artificial reefs, first placed in 1995, became recreational and commercial fishing hotspots by 2011, with some of the reefs recording more than 10,000 trips by anglers.
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