The 300-pound, 7-foot-long mammal was rescued by a team of volunteers early Tuesday morning. They say he was lethargic at the time and barely moved when a net was put over him.
Wilbur passed away at the Marine Mammal Center in Sausalito later in afternoon.
Herculean effort to rescue Wilbur, a 7-foot long adult California sea lion by @TMMC pic.twitter.com/B8RPbR6Suo
— Dean C. Smith (@DeanCSmith) August 18, 2015
He had been out of the ocean for more than 24 hours.
A necropsy will be performed tomorrow.
PHOTOS: Sea lion rescued in Alameda
Big rescue of Wilbur, the sick sea lion in #Alameda by @TMMC tonight on @abc7newsBayArea pic.twitter.com/VeeTm2UQGB
— Dean C. Smith (@DeanCSmith) August 18, 2015
Rescued in #Alameda, Wilbur the sick sea lion is on his way to @TMMC for some TLC pic.twitter.com/f7H3F2huLv
— Dean C. Smith (@DeanCSmith) August 18, 2015