Officials were working to corral a whale back into the ocean Saturday after the marine mammal somehow became stuck in the Ventura Harbor.
The 30-foot-long humpback whale was spotted swimming inside the harbor around 3 p.m., according to the Ventura Harbor Patrol.
Since then, dozens of people lined the shore and the docks to watch.
In a video posted to Instagram, the whale was seen swimming off the end of a dock.
"I’ve grown up here all my life and I’ve never heard of a whale in the harbor," Ventura resident Michele Gambill said.
Ventura Harbor Patrol was trying to encourage the whale to leave.
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It's unclear if the whale is sick or injured.
The plan now is to leave the whale alone for the night -- hoping it calms down and heads out to the ocean.
NBC4's Rick Montanez contributed to this report.