UPDATE 2 p.m., Apr. 18: Lifeguards removed the shark advisory signs at Silver Strand.
SAN DIEGO (KGTV) -- Lifeguards warned beachgoers in Silver Strand after several agencies spotted a shark they say could be a great white off the coast Wednesday.
According to authorities, the shark was initially spotted by Border Patrol agents in a helicopter above Imperial Beach around 10:30 a.m.
The shark was also spotted by a lifeguard in a boat approximately two miles off the coast of Imperial Beach.
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The shark is believed to be between seven and eight foot long. Lifeguards in Imperial Beach say they believe the shark could be a great white.
The shark was again seen about half a mile off the coast of Silver Strand, prompting lifeguards to warn beachgoers.
Lifeguards chose not to issue a formal public warning because the shark was of moderate size, wasn't behaving aggressively and was in an area with few people nearby, City News Service reports.
RELATED: Great white shark attacked 13-year-old boy off Beacon's Beach in Encinitas
The sighting comes less than a year after a 13-year-old boy was attacked by a shark while lobster diving off the coast of Encinitas in September of 2018.
Researchers later confirmed that the shark that attacked Keane Hayes was a great white.
