J.J. slowly rolls to the surface of her pool to get a bucket of fish poured into her mouth. Children surrounding her tank shriek with delight as the gray whale gulps the meal, blows a spray of water and retreats from the noise.

J.J. knows no other life. Sick and near death, she was brought to Sea World 14 months ago as an abandoned baby found washed up on a beach.Now she is healthy enough to return to the sea, scientists believe - but they're not sure she can survive killer whales, the nets of commercial fishermen or her own curiosity.