One witness said he saw a 13-foot great white shark as he rushed to the scene on his jet ski. AdvertisementAdvertisementA 55-year-old surfer is missing, feared dead, after shocked beachgoers witnessed a suspected great white shark attack, this week. Tod Gendle, 55, was surfing with friends when a witness said a 13-foot great white shark attacked him. Simon Nellist, a 35-year-old scuba diving instructor, was killed by a great white shark in what the ISAF classified as a "provoked incident" off the coast of Sydney earlier this year. The great white shark is the largest predatory fish in the world, and it can grow to 21 feet long and weigh 4,500 pounds, according to National Geographic.

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Persons: —, beachgoers, Tod Gendle, Eyre, 7News, Jeff Schmucker, they're, news.com.au, We've, Simon Nellist Organizations: Service, Police, South Australia Police, Western Police, Police Water Operations, Emergency Service, South Australia police, Getty, Australia, Florida, ISAF, Geographic Locations: Eyre, Adelaide, South Australia, Streaky, themseleves, Sydney