J.J. may survive her life in the ocean, but no one will really know for sure.

The gray whale, rescued as a sick infant and raised in captivity, shed both her transmitter packs in less than three days at sea, Sea World spokeswoman Jonna Rae Bartges said."The only way she can be tracked now is going to be visually," Bartges said. "It's disappointing because they hoped to do some long range tracking of the migration."

Sea World researchers followed her by boat until Thursday night. They recovered the first transmitter pack Wednesday off the coast of Coronado, a peninsula community across the bay from San Diego. The second pack was found late Thursday south of San Diego.