The amusement park chain will no longer allow trainers to stand or ride on dolphins.
The moves are often called "dolphin surfing" or "snout stands," and have been a part of the park's show.
SeaWorld insists the practices do not harm the dolphins and says it's continually evolving its animal presentations.
PETA, which SeaWorld calls a group of "ill-informed activists" praises the decision, but is still upset the animals remain in captivity.