It's some weird rule that literally noone follows that goes something like if you are a commercial fisherman fishing on a non commercial day you have to clip the fin if it's over 34in. Nobody follows it and they stack fish on ice for days in advance to sell them on Monday and thursday
Here are the RI regs - Striped Bass 1 fish/day - 28 inch minimum(no closed season)In addition, any striped bass, 34 inches and larger, must have the right pectoral fin removed upon harvest.
The problem with striped bass is quite simple....it's PEOPLE!If you remove people from the problem, there is no problem.