Two people died when a johnboat crashed or overturned on Red Bird River near Oneida in Clay County, the sheriff's office said.
The boat overturned about 2:30 a.m. Wednesday.
Six people were able to swim to shore, but Kevin Carter Sizemore, 16, and Bill Edward Lovins, 20, both of Clay County, did not make it. Rescuers found Lovins' body shortly before 8 a.m. and Sizemore's about five hours later.
Clay County Sheriff Kevin Johnson said eight males ranging in age from 16 to 23 were fishing on a small boat intended to carry fewer people. There was no sign of alcohol involvement, and no charges would be filed, he said.
Some of passengers were related, Johnson said.
"Every section of the county is tightly knit," Johnson said. "Pretty much everybody knows who their neighbor is, who their neighbor's mother and father was, who their grandparents were. Naturally, everybody's devastated."
Johnson said the search for the bodies was relatively short because the river had no current and the six survivors were able to locate the area where the boat overturned.
Earlier this year, it took authorities six weeks to find the bodies of two teenage duck hunters whose boat sank during a storm on a lake in Marshall County.