KEYT ( http://bit.ly/VXND2x) says the body found Friday is that of a young man clad in boxer shorts and was wrapped in kelp.
A sheriff's office statement says the college-age man had facial and head injuries consistent with a fall.
Detectives are working to determine the man's identity.
Isla Vista is an off-campus area where many students from the University of California, Santa Barbara, live.
The bluffs along Del Playa Road have a history of fatal falls, including two partygoers from Santa Barbara College in separate incidents in 2001.
Later that year county supervisors required a 3-foot fence along the bluffs but a young man fell 80 feet to his death in 2003.