According to the Dole Nutrition Institute, flounder contain a high level of omega-3s and selenium. Flounder is also known for being a low-calorie, low-mercury fish. Now is the time to catch flounder on coastal shorelines. Oh yeah… and they’re delicious! Four ways to catch them: 1) drift fishing with live or dead natural baits fished on the bottom, 2) slow-trolling natural baits on bottom, 3) jigging with live bait along jetties, 4) casting from beaches and piers.