I saw an exellent documentary recently on a group studying the great whites of Seal Island, South Africa. Here, during pupping season especially, GWs congrergate and hunt in an unusual manner (for GWs). They locate a seal on the surface and come at it at high speed from almost directly below, breaching the surface with mouth agape and, hopefully, full of seal. Some of the pictures were pretty spectacular, the GWs often completeley out of the water (
See Here ). Wiser and therefore older seals 'know' the region of greatest risk lies during the swim between the open ocean and the shallows and they swim to/from shore hugging the bottom. This mirrors the bottom-hugging, avoid-thrashing-about-on-the-surface strategies mentioned previously.
One guy on the boat discovered (and don't try this at home, even with your family-pet GW) that, when bringing the GWs close to the boat to hand feed, if he placed his hand on the nose of a gaping GW as it poked its head out of the water it seemd to cut off the bite response as if the shark was blinded. It was speculated that what he was actually doing was shorting out the close range electrical sensors upon which the shark relies for close range work and this inhibited the final bite.
If anyone does want to try this. let us know how it turns out. Worst-case scenario - call me on a hands-free phone and I'll type up your report for you ;^)
Cheers,
K.