The Coast Guard rescued all five crew members from the 80-foot "Vicious Fisher" Thursday night before it sank about 13 miles west of La Push, near the northwestern tip of the state.
The boat sank in water 360 feet deep within the Olympic Coast National Marine Sanctuary. A diesel sheen could sicken sea birds and marine mammals.
State Ecology Department spokesman Curt Hart says a Coast Guard flyover Friday didn't spot any pollution.
Hart says the boat's owner has retained a cleanup crew. A salvage company also has been hired to see if the boat can be removed.