OK, the game I lost was due to his good Krush, but also because I didn't play well, cause of being away for long.
Anyways, the Krush that defeated me was due to him not making a dock for fishing. He just went straight for a fast Krush, and it worked.
I guess it's worth seeing for the tactic.
Perhaps, next time I should go for a Thor 3:45 and see what happens...