Eugenie Clark, whose childhood rapture with fish in a New York City aquarium led to a life of scholarly adventure in the littorals and depths of the Seven Seas and to a global reputation as a marine biologist and expert on sharks, died on Wednesday at her home in Sarasota, Fla. She was 92.

The cause was lung cancer, her son Nikolas Konstantinou said.

Long before “Jaws” scared the wits out of swimmers, Dr. Clark rode a 40-foot whale shark off Baja California, ran into killer great white sharks while scuba diving in Hawaii, studied “sleeping” sharks in undersea caves off the Yucatán, witnessed a shark’s birth and found a rare six-gill shark in a submersible dive off Bermuda.

She also swam into schools of man-eating barracuda and had disconcerting encounters with 500-pound clams and giant squid. Despite close calls, she was never attacked, and she tended to make light of the dangers. Indeed, she told of the privileges of exploring an undersea world of exotic creatures and enchanting beauty.

Dr. Clark was an ichthyologist and oceanographer whose academic credentials, teaching and research posts, scientific activities and honors filled a 20-page curriculum vitae, topped by longtime roles as a professor at the University of Maryland and director of the Mote Marine Laboratory in Sarasota.