Someone cut off the head of a sea lion in Northern California and rode off with it in a bag. Authorities are now offering $20,000 for information that helps find the perpetrator.

NOAA officials are looking for a suspect seen using a black 8-inch knife to remove the deceased sea lion's head.

The National Oceanic and Atmospheric Administration’s Office of Law Enforcement said a witness reported seeing a person decapitate the dead animal before leaving the area.

A $20,000 reward is being offered for information that leads to the suspect who decapitated a sea lion on a California beach.

A bike rider who decapitated a sea lion over Christmas and rode off with the animal's head in a clear plastic bag was being hunted on Thursday.