Video shows a sea lion pup that was released earlier this year after being rescued in February wandering on a San Francisco sidewalk. The video was made by the Marine Mammal Center in nearby Sausalito. The male sea lion is nicknamed Rubbish and can be seen hiding under a car and trying to scurry away from rescuers.

The sea lion weighed 30kg at the time of its rescue. The creature has spent five weeks on its own and has lost 17 pounds. The sea lion will be examined by a veterinarian to see if it has any other health issues responsible for its plight.

According to a report of the San Francisco Chronicle, 159 sea lions have been released by the center back into wild this year. The sea lion is only one of thousands sea lion pups found stranded along the state's coast this year because of warm waters that caused food scarcity, said Marine Mammal Center officials.

When Rubbish was rescued earlier this year it was malnourished and suffered from pneumonia. It was transferred to the Marin facility, the world's largest such rehabilitation facility.

After spending some time in the health center, Rubbish got rid of the infection and doubled its weight. It was released March 23 at the Point Reyes National Seashore. But it lost 17 pounds after five weeks on its own.

"We don't get a lot of restrands; normally fewer than 20 a year. Most (rescues) figure out how to find the food they need to survive", Shawn Johnson, director of veterinary science, told USA TODAY.

Blood work and other test results would help determine on Friday if the pup has another infection or some other underlying health issue, said Johnson, who recognized Rubbish from his first stay.