I can see it now: Chief's new RBF magnetic hooks!
"Michael Winklhofer of the University of Munich led a team that found magnetosensory cells from a rainbow trout's nose, which contained iron. The finding may shed light on how animals sense the magnetic field of the Earth."
http://r.smartbrief.com/resp/dLltCjrbAWCdxImBCidmoiBWcNVbkI?format=multipart