This is mildly interesting, it is a bit about tagging sharks and how far they have travelled, via some satelite tags placed in the dorsal fin and transmitting GPS data to satelites, a couple of them were tagged by a good friend of mine, it is somewhat interesting how they will zig zag seemingly aimlessly, but end up at certain spots repeatedly, I guess it must be food sources or something.
http://www.seqtigersharks.com/index.shtml