( CNN ) -- Shows at SeaWorld in San Diego , California , are expected to resume on schedule Wednesday , a day after a 12-year-old male killer whale died . The whale showed signs of being ill only on Monday , the park announced . The cause of death for Sumar wo n't be known until a necropsy is complete , SeaWorld said . Results may not be known for several weeks . `` It 's a very sad day , '' spokesman Dave Koontz told CNN on Tuesday . `` He was a great young killer whale . He was sharp . '' Sumar , who weighed about 5,000 pounds , had been at SeaWorld San Diego since 2001 , coming from an Ohio park . He was one of seven killer whales at SeaWorld and was able to exhibit about 100 `` behaviors , '' Koontz said . The killer whale had no medical history or problems with behavior , the spokesman said , adding that there was no evidence of communicable disease . `` He had a great disposition . '' `` Trainers had noticed that Sumar was acting lethargic yesterday [ Monday ] afternoon . Park veterinarians began a regimen of antibiotics to help try to stabilize his condition while they attempted to determine the cause of his illness , '' a SeaWorld statement said . `` His condition worsened today and a decision was made to cancel the 12:30 p.m. Shamu show , so that trainers and veterinarians could continue to devote their full attention to Sumar . Despite these efforts , Sumar did not survive . '' Orlando , Florida-based SeaWorld was recently fined $ 75,000 by the Occupational Safety and Health Administration for three safety violations , including one classified as willful , after an animal trainer was killed by a whale in Orlando in February . SeaWorld , which also has a location in San Antonio , Texas , said it would contest the violations . The last killer whale to die at the San Diego venue was Splash , who was sickly when SeaWorld adopted him . He was nursed back to health and lived 15 years until 2005 . No public memorial for Sumar has been planned , although fans will be able to comment on the park 's Facebook page , Koontz said .
SeaWorld whale dies at Killer in Sumar . Sumar was lethargic a day . Sumar was able to exhibit three 'behaviors '