Stoner and Kaimmer (2008)[4] reported success using cerium mischmetal and Pacific spiny dogfish (Squalus acanthias, a type of shark) in captivity, both with tonic immobility and feeding preference tests. Lead metal was used as a control. Encouraged by the results, a longline study was conducted off Homer, Alaska in late 2007 with the cooperation of the International Pacific Halibut Commission.