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Atlantic and Pacific mahi mahi are the same species, but genome-wide genetic studies show they form separate, non-interbreeding populations by ocean basin. Here is what that means for management.

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A 25-year tagging program has tracked mahi mahi migrating over 2,500 miles and completing 8,000-mile circum-Atlantic loops. Here is the real tracking data behind how and why they move.

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Sargassum weed lines concentrate baitfish in otherwise empty open ocean, and also serve as a nursery for juvenile mahi mahi. Here is why floating structure matters so much to this species.

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Mahi mahi live in the top 100 feet of warm open ocean worldwide, across four genetically distinct populations in the Atlantic, Pacific, Indian Ocean, and Mediterranean. Full range, depth, and temperature data.

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Male mahi mahi develop a steep forehead through sexual selection, a dominance and mate-attraction signal seen across several fish species. Here is the biology, timing, and trade-offs behind it.

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Most mahi mahi weigh 15 to 30 pounds, but the species fastest-growing-fish biology means the size range runs all the way up to the 87-pound world record. Here is the full breakdown.

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Bull and cow mahi mahi differ in more than just forehead shape. Here is the full identification guide covering size, behavior, and why anglers spot the difference from a distance.

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Mahi mahi can shift from dull olive to electric blue and gold in under a second, using nervous-system-controlled pigment cells called chromatophores. Here is the biology behind the display.

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Mahi mahi earned the name dolphinfish for swimming alongside boats like actual dolphins, and it caused enough menu confusion that the US restaurant industry switched names in the 1980s.

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Mahi mahi answers to dorado, dourado, shiira, lampuki, and more. A tour through this fish global names, the story behind each one, and Malta entire fishing season built around it.

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