People become musicians just to avoid waking up at 5 a.m. and getting to their job at 7 a.m. But for rocker Mickey Melchiondo, that's more like a day off. For the past three months, Mr. Melchiondo and co-captain Randy Matlack of Mickey's Guide Service (www.mickeysfishing.com) have been getting up at 2:30 a.m. and driving to the Shark River Yacht Club in Neptune, N.J., to fish the Atlantic Ocean with paying customers. It's something they do five to six days a week during the season.

On...