Actually, Blood Surf wasn't made for TV (it has one scene on the DVD where one slip of the camera would have made it a porno.) Neither were the Sharck Attack movies. Dinocroc might have been. Regardless, they can be pretty bad.
I also erred in the title. It is shark and crocodile day on SciFi. Blood Surf has sharks on the the cover of the DVD, but it is about a giant crocodile.