Summary
Two rare earth metals (neodymium-iron-boride magnets and cerium mischmetal) attached to baited hooks were tested in a laboratory study against inert metal controls to determine the effects of spiny dogfish and Pacific halibut. Spiny dogfish attacked and consumed fewer baits with mischmetal than for the control or magnets. Magnets did not deter dogfish from eating baits, and Pacific halibut showed no reaction to either rare earth metal.