Ecology Department spokeswoman Linda Kent said Thursday there's a nameplate on the boat, but it's barely legible.
The boat was found Monday covered with barnacles and seaweed. It was taken to a state parks maintenance facility and tested for invasive species.
Kent says another boat found April 23 near Long Beach, also covered with marine life, had no marks that could determine its origin.
She says there has been no confirmed tsunami debris since last year.