Keep your head on a swivel — around otters.

An aggressive otter pulled a young child off a dock and dragged them underwater at a marina in Washington, officials said.

The attack happened at about 9:30 a.m. Thursday, Sept. 12 at the Bremerton Marina, the Washington Department of Fish & Wildlife said in a news release.

A family was walking down the dock when the animal appeared and pulled the child underwater for a few moments, officials said.

The mom reached into the water to rescue her child and was bitten on the arm by the attacking otter, officials said.

She was able to get her child to safety, but the otter followed after the family as they left the dock, official said.

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