Their _could_ certainly be a bit of that to be sure...as it stands, here are the baits/lures that make mentions of something (condition) other than simply Freshwater, Saltwater, or All Purpose:
Code:
Lugworm - "Ocean Fishing"
Crayfish Ball - "River Fishing"
Pill Bug - "Coastline Fishing"
Goby Ball - "Ocean Fishing"
Crab Ball - "Ocean Shallow Fishing"
Herring Ball - "Shark Fishing"
I tend to want to believe that there is no advantage (other than bite rate of various fish) when using the correct bait in the approprate waters. If you review the above mentioned baits, all but 1 (the crayfish ball) are used for Saltwater...hardly seems like a 'fair' distribution in 'special effects' should it exist.
I would believe that crab balls are better suited to catching Bream because its a type of bait they like, as opposed to it being because its for 'shallow' fish and they are caught at +1. As it is, I'm on the coast of Bloodshore now with some crab balls in my pocket (2 stacks left) and some spoon lures fishing for bream specifically. I am getting currently a large distribtion on the crab balls (50 into it) across the board (at +1)...Sea Pickles, Nautalus, Bream, Oysters and occasionally kelp. The bream and oysters are being the most common and about equal in their bites, dispite the oysters being -4. Switching over the spoon lures, so far (about 60 into it) its about the same distribution of Oysters and Bream, but much fewer of the others. Weather has been the same and moon.
Too early to tell, small sample at the moment. But I'll update my thread on bait and bite rates as I collect mroe info here. (the bream are working to get my Cul up to make some Herring Balls....I keep hearing on various boards that big sharkies can be caught, and perhaps we need this bait...so worth a shot).