SeaWorld trainer Dawn Brancheau was in the water up to her shoulders frolicking with a huge killer whale seconds before the orca playfully grabbed her ponytail and dragged her under, according to a tourist's video of the tragedy.

The six-minute video shot Wednesday shows Brancheau feeding and playing with the six-ton Tilikum, the largest and oldest killer whale in captivity.

An edited version of the video posted online by WESH-TV in Orlando, Fla., ends moments before the trainer and whale's relaxed romp suddenly turns fatal.

Police officials had previously said Brancheau slipped and fell into the tank with Tilikum.

Witnesses had recounted dramatic scenarios in which the orca jumped out of the water and grabbed the trainer.

The video instead shows Brancheau feeding him fish, rubbing his nose, pouring buckets of water on his snout and then getting into the water with him.

"He had done an entire show sequence where he performed and he did really well. Dawn was rubbing him down and interacting with him and rewarding him for doing such a good job," SeaWorld curator Chuck Tompkins told CBS' "The Early Show."

"There wasn't anything to indicate to us that there was a problem," he said.

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Opinion Piece from Janet Mann, Ph.D.("Killer Whale -- A Name that Suits") on FoxNews