Recipe

Baked Mahi Mahi (Dolphinfish) with Lemon Herb Butter

Tender, flaky dolphinfish (mahi mahi) baked fast with lemon, garlic, herbs, and a buttery sauce that begs for a spoon.

By Matt Campbell

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4.7

A sheet pan with two baked mahi mahi fillets topped with melted lemon herb butter, with roasted lemon slices and parsley on a warm kitchen counter

Let’s clear the air right away: in a lot of seafood markets and older cookbooks, "dolphin" refers to mahi mahi, also called dorado. It is a firm, mild fish that bakes beautifully. Not the marine mammal. We are keeping it delicious and firmly in the seafood lane.

This is my favorite low-drama way to bake it. Hot oven, quick cook, and a lemon herb butter that melts into the fish and turns into an instant sauce. You get crisp edges, a juicy center, and that moment where you pause mid-bite because the garlic and citrus hit just right.

Raw mahi mahi fillets patted dry on a wooden cutting board with lemon, garlic, parsley, and butter nearby on a bright kitchen counter

Why It Works

Fast, gentle cooking: A hot oven and short bake time keeps mahi mahi tender instead of dry.
Sauce built in: The lemon herb butter melts into the pan juices, so you get a spoonable sauce without extra steps.
Crisp edges, juicy center: Drying the fish and using a preheated pan helps browning, even in the oven.
Flexible flavor: Works with fresh herbs, dried herbs, or what is hanging out in your fridge door.

Pairs Well With

Storage Tips

Storage tips that actually keep it good

Refrigerate: Cool leftovers, then store in an airtight container for up to 2 days. Fish is best sooner rather than later.

Reheat: Warm gently in a 300 F oven until just heated through, about 8 to 12 minutes depending on thickness. Add a small pat of butter or a splash of broth to keep it moist. Microwave works, but go 50 percent power in short bursts so it does not turn rubbery.

Freeze: You can freeze it, but the texture softens. If you do, wrap tightly and freeze up to 1 month. Thaw overnight in the fridge, then reheat gently.

Leftover baked mahi mahi in a glass airtight container with lemon slices, sitting on a clean kitchen counter

Common Questions

Common questions

Is dolphin fish the same as mahi mahi?

Yes. Dolphinfish is another common name for mahi mahi, also called dorado (Coryphaena hippurus). Many stores label it as mahi mahi to avoid confusion with the marine mammal.

How do I know when mahi mahi is done baking?

It should flake easily with a fork and look opaque. For an instant-read thermometer, insert it from the side into the thickest part. For food-safety guidance, the FDA recommendation for finfish is 145 F. For a juicier result, many cooks pull mahi mahi around 135 to 140 F and let carryover heat finish the job.

Can I use frozen fillets?

Absolutely. Thaw overnight in the fridge, then pat very dry before seasoning. Extra moisture is a common reason baked fish turns pale and watery.

What if my fillets are thin?

Thin fillets cook fast. Start checking at 7 to 8 minutes. If they are very thin, you may not need broiling at the end.

What flavors go well with dolphinfish (mahi mahi)?

Lemon, lime, garlic, paprika, cumin, oregano, dill, parsley, capers, and anything tropical like mango salsa. This recipe stays classic and buttery, but you can steer it any direction.

Matt Campbell

I have always had a huge passion for the culinary arts, people, working as a team, and so on. I wanted to pursue my love for cooking initially at Virginia Commonwealth University with a culinary arts degree; however, I instead decided to apply myself and acquire more practical skills. My end goal is to eventually open my own restaurant or similar establishment.

Kitchen Essentials

Rimmed sheet pan or baking dish
Parchment paper or foil (optional, for easier cleanup)
Small bowl for mixing butter
Microplane or fine grater (for zest)
Instant-read thermometer (optional but helpful)

The first time I cooked “dolphin” at home, I had a full-on “wait, what?” moment in the seafood aisle. Once I learned it was mahi mahi, I got brave. Now it is one of my go-to weeknight wins because it behaves, holds together well, and likes bold seasoning. It also forgives you if you are juggling three things at once. Also, lemon herb butter makes basically anything feel like you tried harder than you did, which is my favorite kind of cooking.