Sometimes I'll detour to Knuckle Bouy on Horseshoe and Tower trips and jig for cigar minnows. I'm no expert, but, I believe they like some structure. Also, you may want to physically mark the Tower on your GPS, I've heard the future published numbers will be a little off.
Congratulations on the grouper hook-up

I've caught Black Fin Tuna that acted the same way at the 'Shoe. You can see it at FF photos section (only pic. I could post

). Actually, that one caught by Mrs. FF.