Volunteers with the Marine Mammal Center in Sausalito set Jenya free last week at Rodeo Beach in the Marin Headlands.
Jenya was rescued mid-November with a severe shark bite wound and malnutrition.
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Five weeks of rehab later, Jenya had regained full motion in his left flipper and put on 25 pounds.
Officials say that if anyone should find a seal or sea lion in distress to call the Marine Mammal Center's response hotline at 415-289-SEAL.