These kind of shark discoveries make sharks folks excited especially when divers come back with brilliant images.A 31-year-old marine biologist discovered a secret deep-water grotto, seething with 19 grey nurse shark pups, heavily pregnant females and fully-grown males off the coast of Exmouth.
The grey nurse shark mating cave, or aggregation site, is one of the first of its kind to be documented in WA waters.
Ms O'Callaghan got up close and personal with these docile creatures during a 40-minute recreational dive last month. She surfaced with some amazing photos.
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