Setting Up Your First Mexican Mullet Run
The first thing you need to understand is that mullet isn't like working with common baitfish. It has a different structure, a different texture, and if you treat it like tilapia or snapper you will waste half your catch. I learned this the hard way when I tried filleting a batch of fresh Gulf mullet using the same technique I use for red snapper. The skin separated cleanly but the flesh fell apart into slivers before I even got the knife halfway through. Took me three attempts and about $40 in lost product to figure out the angle was wrong, not the knife. Mullet in Mexico isn't just a fish you throw on the grill. It's got a whole lineage. In Veracruz and the Yucatán, they cure it. They dry it. They press it. The head alone is worth more than most people think because that roe sac, the milt, and the cheek meat all pull apart cleanly when handled right. That's what makes it iconic in coastal markets. You see carts stacked with whole mullet, some salted, some fresh, and vendors who can tell you the exact tidal window it was pulled from. The controversy comes from the feeding habits. Mullet are bottom feeders, omnivores, opportunistic. That means in certain bays and estuaries you get a distinct muddy flavor that some people genuinely can't get past. Other bays produce mullet with clean, almost sweet flesh. Location matters more than species. I've caught the same fish ten miles apart and the difference was night and day. That's probably why the debate over whether mullet is "trash fish" or premium ingredient still gets heated at fish markets from Tuxtla to Mazatlán.
Here's what most guides don't tell you about cleaning mullet. You cut behind the pectoral fin, yes, but you don't remove the stomach. The stomach contains bile, and if you puncture it during gutting the entire belly turns bitter. I used to scrape the guts out quickly, which worked fine until I handled a batch from the Sontecomapan lagoon where the mullet had been feeding on dense algal mats. Every single fish came out bitter. Blew up a whole catering order for a weekend market stall. The workaround is simple but changes your entire process. You make a shallow incision along the belly, peel the skin back just enough to expose the gut cavity, then turn the fish over and remove the internal organs through the gill opening without ever cutting through the stomach wall. It takes longer. About four minutes per fish instead of two. But your yield and flavor stay intact. I switched to this method two years ago and haven't gone back. There's another thing people miss. The scales on mullet are cycloid, which means they're thin and loose. A standard scaler works, but many people switch to a knife blade and scrape backward from tail to head. That strips the skin sometimes. If you want to keep the skin on for rendering or crisping later, you use a dedicated scaler or your thumb and work with the grain of the scales. Takes more effort but preserves the skin for applications where that collagen matters.
Fillet yield from a medium mullet, roughly 8 to 10 inches, comes out to about 35 percent dressed weight. That's lower than a lot of pelagic species because the bone structure is denser and the collar area has more cartilage. The collar itself is where the best meat lives. A lot of vendors just cut it off and sell the body fillets at a premium while the collar goes to feed dogs. Don't do that. The collar is rich, fatty, and holds together better during cooking than the loin. If you're smoking or braising, collar-first cuts outperform everything else. Preservation is where mullet really earns its reputation. Fresh mullet keeps about two days on ice if you haven't broken the gut. Salt curing is the traditional approach, and the ratio matters. A standard brine is one part salt to four parts water by weight, but for mullet I go slightly heavier. One to three. The flesh absorbs the cure differently than cod or hake because of the higher fat content. Too light and the center stays raw. Too aggressive and you overdraw moisture from the edges before the salt reaches the middle. I test by pressing the thickest part of the loin against my thumb. It should spring back slowly, not hard and dry. Drying mullet in the sun requires a specific condition. Temperature above 75°F, humidity below 60 percent, and wind movement. The Yucatán coast hits this window reliably from late February through April. Outside that window you risk surface spoilage before the interior dries. I've seen people try this in June and end up with fermented fish that smelled worse than anything I've dealt with from improper gutting. Not worth the risk.
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If you're looking to buy fresh mullet, your best bet is a dedicated pescadería in a port city. Supermarkets in Mexico City sometimes carry it frozen, but the texture degrades noticeably from freeze-thaw cycles. If you can't source it fresh, frozen whole fish that was individually quick frozen right after catch is the next best option. Thaw in the refrigerator for 18 to 24 hours, never at room temperature. Mullet holds water differently than lean white fish and thawing incorrectly makes the flesh mushy. One more thing. Mullet oil is potent. When you render it for cooking, strain through multiple layers of cheesecloth while warm. If you skip the straining, the fine particulate from the roe and connective tissue will burn at normal cooking temperatures and give your dish an acrid finish. I use rendered mullet oil for finishing roasted vegetables and it works better than most nut oils I've tried. Just keep it refrigerated and use within three weeks. It goes rancid faster than you'd expect from a fish oil.
