A 5- to 6-ounce mahi-mahi steak takes five minutes to cook per side on a grill over medium-high heat. When done, the fish should be firm to the touch and should not stick to the grill. If it sticks, it needs to be cooked another minute and then tested again.
"Mahi-mahi" means "very strong" in Hawaiian. The mahi-mahi, also known as the pompano dolphin or the common dolphinfish, is a surface-dwelling tropical fish. It is not related to dolphins, despite its name. On average, a single mahi-mahi weighs 15 to 29 pounds, although catches over 40 pounds occur occasionally. The mahi-mahi matures early, spawns frequently and grows fast, making it a popular food source worldwide.