A disappointing follow-up.
I enjoyed Roy Scheider's performance and the core action sequences near the end, but everything else is a bit boring. 'Jaws 2' puts high focus on the teenagers, though their story never possesses any intrigue. The effects for the shark, meanwhile, are a step down from the original.
It's not terribly far from being watchable, a slightly shorter run time might've helped in that regard, but I just personally found it to be an uninteresting 115 minutes or so. Perhaps initial director John D. Hancock's ideas would've came out better, though he was fired during production; speaking of which, the issues behind the scenes for this - and even the first film, really - are pretty fascinating.