A barnacle-covered World War II-era explosive that washed up on a Florida beach Sunday was safely detonated, according to MyFoxTampaBay.

The nests of nearby sea turtles were not disturbed by the explosion.

The discovery of the object on St. Pete Beach prompted authorities to evacuate the area and set up a 300-yard perimeter, forcing some people to leave their homes.

Explosive disposal teams from MacDill Air Force Base and the Hillsborough County Sheriff’s Office detonated the device around 5 p.m.

The cylindrical device, about 4 feet in length, was identified as an M122 photoflash bomb. The ordnance was intended to detonate above ground, creating a bright light to assist in the taking of nighttime aerial photographs.

A person walking near the 22nd Ave. beach access spotted the object in the surf and alerted authorities. Deputies said it appeared to have been submerged for a significant amount of time.