The Pinellas County Sheriff's Office says a 17-year-old swimmer was found dead after an hourslong search Wednesday off the Pinellas County coastline. The swimmer, identified as William Zhang, disappeared underwater just after 9 a.m. Wednesday in the area of 19534 Gulf Boulevard in the Gulf of Mexico, Pinellas Suncoast Fire Rescue Chief Jeffery Davidson said. Detectives say Zhang was visiting Florida from Quebec, Canada, with his swim team for a camp. He was conducting swimming drills in the Gulf with several of his teammates when he did not return to shore. "I was jogging earlier this morning along the beach and I saw about 10 young people with, I presume, an instructor talking to them," David Hoag, one of the witnesses in the area, said. MORE: https://www.wtsp.com/article/news/local/pinellascounty/missing-swimmer-indian-shores/67-ba3b4bbf-3a14-415f-8744-23df4483f86a ►Subscribe: https://on.wtsp.com/youtube ►Website: https://www.wtsp.com/ ►Facebook: https://facebook.com/10TampaBay ►X: https://twitter.com/10TampaBay