Admission to manly sea life aquarium is included when purchasing a shark dive extreme experience diving with sharks at manly sea life sanctuary sydney is an exhilarating experience and one of only a few experiences worldwide where youre guaranteed an underwater encounter with sharks our colony of grey nurse sharks range in size from 1 to 3 metres and when you do your shark dive with us you get to enter their domain without cages about the sharks grey nurse sharks are highly endange