No - hair's too short, and it's blonde, not white (there are a couple covers with Jak on them, so you can compare). Besides, Jak wouldn't be cringing from a giant fish.

Did they *gasp* add a new character??

Thats whay I said "...It can't be Jak surely -can it?" You never know with the current cover artist. It is unusual to see the same character (even a member of the main group) appear on the cover of successive books.

And yes I do know Jak's hair is white -and long, I've been reading the books for quite a few years now