Fresh wild-caught mahi mahi fillet available per pound at Costco's seafood counter. Mahi mahi is a whitefish with mild flavor and firm, dense texture that doesn't flake easily. The meat is lean and versatile, suitable for grilling, baking, pan-searing, or poaching. Unlike fatty fish like salmon, mahi mahi has a meaty texture similar to cod but firmer, making it excellent for fish tacos, sandwiches, or serving over rice. The mild flavor appeals to those who prefer less fishy-tasting seafood. Costco offers both fresh mahi mahi sold by the pound at the seafood counter (availability varies by location) and frozen Kirkland Signature mahi mahi in 3-pound bags with individually vacuum-packed, boneless, skinless portions. Fresh mahi mahi cooks quickly, typically reaching an internal temperature of 140°F in 5-7 minutes when pan-seared or poached, or 10-12 minutes when baked at 400°F.