(CNN) -- Sixty passengers on a Carnival cruise ship have been treated for minor injuries after the ship listed suddenly to avoid an object in the water, a Carnival spokeswoman said.
The ship listed 12 degrees to the right to avoid hitting a large, adrift buoy at approximately 12:55 p.m. CT Wednesday, Carnival spokeswoman Jennifer de la Cruz told CNN.
The submerged buoy, 200 miles off the Louisiana coast, did not show up on the ship's radar, Coast Guard spokesman Petty Officer Richard Brahm said.
The ship, Carnival Ecstasy, was carrying approximately 2,340 passengers and 900 crew, de la Cruz said.
It was on the final leg of a five-day cruise that left Galveston, Texas, on Saturday, April 17, with stops in Cozumel and Progreso, Mexico.
De la Cruz said the ship docked in Galveston as scheduled Thursday morning.
Injured passengers were treated in the ship's infirmary and some minor damage to merchandise and unsecured objects was reported, she said.