treat aquaculture fish for or protect aquaculture fish from disease

) was operated as a fish processing or fish tender vessel in the navigable ..... ) was a fish tender or fish processing vessel ..... Secretary to have been made for the purpose of using the vessel as a fish ..... tender or fish processing vessel in the fisheries ..... subsequently rebuilt in the United States for use as a fish processing vessel

) the vessel is a fish tender vessel that is not engaged in the harvesting ..... or processing of fish