SAN DIEGO (CBS 8) - There's a new discovery in the mystery of the beached fin whale in Point Loma.

On Tuesday, researchers said they found a fin whale fetus next to the 50-foot-long whale that washed up over the weekend. It was estimated to be about five feet long and in poor condition.

A necropsy on the adult whale will go on as planned Wednesday at Fiesta Island, assuming lifeguards can tow it off the beach and into Mission Bay.