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They have a hut setup on the beach at Great Stirrup Cay for rental equiptment. The price was about $25.00 for mask,snorkel fins and vest. You can bring your own snorkel and mask and pay nothing. Bring some leftover dinner rolls from the ship and place them in a zip top plastic bag and poke a small hole in the bag to let out small particles of bread. The fish will be all around you in seconds.