“If you're going to have an encounter with a shark this is probably the best scenario you could have,” he said, adding the lifeguard received immediate treatment from other officials already engaged in the training.
“We have never had an incident like this occur. Hopefully we never will again.”
Mr Bellone said there was an additional shark sighting following the attack, though it was not clear whether it was the same shark.
The beach was closed to swimming the rest of the day but expected to reopen on Monday with officials monitoring the water for sharks.