…And that’s actually a good thing for fish.
For all the harm that the oil and gas industry inflicts on wildlife in the Gulf of Mexico, it does offer the marine ecosystem at least one big benefit. Offshore oil-drilling rigs serve as artificial reefs, providing shelter for animals and an anchor for plants, coral, and barnacles. Yet once a well is tapped, the federal government has required the drilling company to uproot its rig to help clear clutter that could obstruct shipping.
unlikelywords.com 
If the abandoned rigs have benefits they should leave them in. If fish are making home and living their, then their is no reason for them to be taking them out. Yes, they take up a lot of room but they are doing good.
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What happens once it rots though?
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