Authorities did not immediately confirm whether the body was that of 20-year-old Szabolcs Prem. He has been missing since Wednesday's accident, which also claimed the life of 16-year-old Dora Schwendtner. Her body was recovered early Friday nearly two miles downriver from the accident site.
The second body surfaced from beneath a salvage barge after crews raised the amphibious tour boat from the river bottom and the barge began hauling it away. A police boat pulled the body on board about a block downriver from where it surfaced.
Thirty-five other people were rescued after the 250-foot barge ran over the duck boat.
Schwendtner's body was identified judging from possessions shown to her fellow tourists, said Jeff Moran, a spokesman for the Philadelphia medical examiner. An autopsy showed she died of drowning, and her death has been ruled accidental.
The boat was lifted from the water Friday afternoon about 100 yards from shore by a crane using two heavy yellow straps. A third strap was looped around the white boat as it remained in the water, its canopy and seats above the waterline.
Police and Coast Guard vessels surrounded the boat as it emerged from the water and was placed on a barge. Authorities plan to inspect it for clues to why it stalled out.
The duck boat will be taken first to the Coast Guard station in Philadelphia and then moved to another secure location, said Coast Guard Chief Rodger Krass.
The Norcross, Ga.-based company that owns the duck boat operation said Thursday it had followed safety recommendations after a 1999 sinking in Arkansas, but it still suspended its operations nationwide.
Schwendtner and Prem were among 13 Hungarian students, two Hungarian teachers, four U.S. students and three U.S. teachers on a tour hosted by Marshallton United Methodist Church in suburban Philadelphia.
Black flags were raised Friday at the victims' school and at the city hall in their hometown of Mosonmagyarovar, in northwestern Hungary. School principal Karoly Hansagi told MTI that a candlelight vigil would be held Saturday night.
One of the duck boat passengers, Tina Rosebrook of Davidson, N.C., told The Associated Press that she was briefly under the bow of the barge. She had time to get life jackets on her 10-year-old daughter and 12-year-old niece but not herself. She found a life jacket floating on the river when she surfaced.
Police rescue boats arrived and helped them out of the water almost as quickly as they'd been submerged.
On Thursday, National Transportation Safety Board Investigators dug into their efforts to reconstruct what went wrong. They expected to spend more than a week working in Philadelphia before heading back to Washington, D.C., to continue their investigation.
Board member Robert Sumwalt said the agency would look into the condition of the vessels and whether proper protocols were followed. The NTSB planned to interview those aboard the boats, listen to recordings of radio transmissions and study videos from cameras posted nearby by the city of Philadelphia and at least two television stations.
Chris Herschend, president of the boat company, Ride the Ducks, said Friday that the captain, Gary Fox, told him he had put out a distress call on Channel 13, which is monitored by boaters but not recorded.
The Coast Guard has said that it received a transmission over an emergency channel around the time of the collision, but that no voices or other recognizable sounds could be discerned.
Sumwalt said the experience and condition of the two-member crew of the duck boat and the five-member crew of the tug would be checked out. He said tests showed none had been drinking. Drug test results were expected in about a week.
Inspection records for the sunken duck boat have been turned over to the NTSB.
Ride the Ducks has been in Philadelphia since 2003. Passengers are driven on a tour of the Old City neighborhood near Independence Hall before riding into the Delaware River from a ramp south of the Ben Franklin Bridge.
