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Catsharks on Billy Mitchell shipwreck

By Coastal and Marine Hazards and Resources Program 2013 (approx.)
Image shows a bent metal piece from a shipwreck covered by hundreds of catsharks.
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Detailed Description

Hundreds of catsharks, or chainlink dogfish, rest on one of the "Billy Mitchell" Fleet shipwrecks. The shipwreck has also been occupied by colonies of anemones, starfish, and hydroids. 

Sources/Usage

Public Domain.