If you’ve ever bought Layang Scad from me, you probably know it’s one of the most reliable and delicious small pelagics we supply. But I get questions all the time—especially from other small-scale seafood folks, or even new buyers just figuring out their supplier choices—about exactly what kind of habitat these fish like. To be honest, I didn’t always pay this much attention to it at first. When I started my small fish supply side hustle a few years back, I was just focused on pulling in consistent catches that tasted good and held up when we ship ’em. But after noticing how their behavior shifts with seasons, how their size changes based on where they’re hanging, and even how their flavor can vary depending on water conditions, I started digging into the science (and testing it first-hand out on the water). For anyone buying Layang Scad, this stuff matters—because the habitat these fish call home directly impacts their quality, availability, and how sustainable they are to source. Layang Scad
Let’s start with the basics: Layang Scad (we also call them Selar Layang in the trade, since that’s their common regional name) are schooling fish, right? I think that’s the first big clue about their habitat. They don’t wander around solo, so where you see one, you’re gonna see hundreds, maybe thousands. Now, the water itself has to hit a certain sweet spot. From all the data I’ve pulled from local coastal fisheries reports, plus the time I spend with the old timers on my crew, Layang Scad prefer warm, tropical, and subtropical waters. We’re talking surface temps between 22°C and 30°C (that’s 72°F to 86°F for my US-based buyers, since I know that’s what you actually use). If the water drops below 20°C (68°F)? They start moving further out, or down a little deeper, but not too far—they’re still mostly pelagic, meaning they stay in the open water column, not near the seabed like some bottom-dwellers. I’ve noticed this most in my regular grounds off the southeast coast; when winter hits, the water temp drops, and my catches get smaller, sparser, and the fish don’t taste as rich. When spring rolls around, that warm water comes back in, and suddenly we’re pulling in big, plump schools that are perfect for grilling, canning, or whatever our clients need.
Next up: salinity. This is a big one I didn’t even think about early on. I used to just check if the water was “salty enough” and move on, but then I learned Layang Scad hate super low salinity. They need waters with a salinity level of around 30 to 35 parts per thousand (that’s basically full marine salt, almost like open ocean). I’ve found that where a river dumps fresh water into the ocean? Yeah, there might be other fish there, but not Layang Scad. Why? Because their bodies are built for saltwater, and low salinity stresses them out—they can’t regulate their water balance properly, so they avoid those areas. That’s why my main fishing spots are 10 to 20 nautical miles offshore, where the mix of river runoff is minimal and the salinity stays consistent. If I tried to fish closer to shore, where the water is a little less salty, I’d come back with almost no Layang Scad—just some anchovies or sardines that handle lower salinity fine.
Now, what about food? Schooling fish need a lot of food, right? Layang Scad eat zooplankton, tiny fish larvae, and small crustaceans like copepods and krill. So their habitat has to have a steady supply of that stuff. That’s why they tend to hang out near things like upwellings—where deep, nutrient-rich water rises to the surface, feeding all that tiny plankton. Or around coastal current edges, where two different water currents mix, creating a buffet of food. I’ve noticed when I fish near these current lines, my catches are way bigger and the fish are better fed. Last year, I spent a week chasing a warm current that shifted a little north of my usual grounds, and I pulled in so many fat Layang Scad that I had to bring in a buddy’s smaller boat to help haul ’em in. That’s the difference between knowing their habitat and guessing—when you’re where the food is, the fish follow.
Depth is another key point. Layang Scad aren’t deep-sea fish, but they don’t stay right at the surface either. From what I’ve seen, they hang out in the top 50 to 150 meters (165 to 490 feet) of water. During the day, they tend to dive a little deeper—around 50 to 100 meters—maybe to avoid predators like larger tuna or seabirds. At night, they move up closer to the surface, around 20 to 50 meters, to feed more easily. That’s why my fishing schedule shifts with the sun: I’ll hit my spots around dawn, when they’re moving up to feed, and that’s when I get the best catches. If I go out midday, I have to lower my nets a bit deeper, and the fish are a little skinnier because they’ve been holding in deeper water with less food access. I’ve also noticed that younger Layang Scad (the ones under a year old, usually around 10 to 15 cm long) tend to hang a little shallower, closer to the surface, whereas the older, bigger ones prefer the mid-water range. That makes sense—juveniles need less food overall, and they’re easier to catch in shallower water, but they’re not as good for clients who want a larger, more substantial fish.
One thing that’s super important for anyone buying Layang Scad, and even for the sustainability of the fishery, is how their habitat is tied to seasons. I mentioned the temperature thing earlier, but it’s more than that. In the summer months here, roughly May to October, the warm water pushes closer to shore, the currents are strong, and the plankton is booming. That’s when we get our largest, highest-quality catches—these are the fish my restaurant clients go crazy for, because they’re plump, have a nice rich flavor, and hold up great on grills or in soups. In the winter, November to February, the water cools down, the currents shift, and the Layang Scad move further offshore, so we have to fish a lot harder to find them. They’re also smaller and leaner, so that’s when I usually sell them to canning companies or for processed products, since their flavor is still good but not as bold as the summer catch. I’ve had clients ask me if I can supply them year-round, and sure, I can, but the quality varies a little with the seasons because the habitat shifts. That’s not a bad thing—It’s just how wild-caught seafood works, and anyone who’s honest about their supply will tell you that.
Now, let’s talk about how I use all this knowledge to make sure I’m supplying the best Layang Scad possible. I don’t just show up at a random spot and cast nets. Before each trip, I check the local ocean data—water temps from the coast guard’s monitoring buoys, current patterns from the marine institute, even salinity levels from the small water test kit I keep on my boat. I also chat with other local fishermen who’ve been at this for decades, because they know the grounds way better than any app does. Last year, one old guy told me about a small current eddy that forms just south of my main spot during July, and that’s where the really big Layang Scad school. I tried it, and he was dead right—my catch that week was 30% bigger than average, and the fish were 20% plumper. That’s the kind of stuff you can only learn by understanding their habitat, not just reading a textbook.
For my buyers, this matters because if you’re looking for a consistent product, knowing what habitat the fish prefer helps you pick a supplier who actually pays attention to these details. I’ve had other suppliers hit me up trying to sell me smaller, skinnier Layang Scad from off-season or from areas where the water is less ideal, and it’s obvious—those fish don’t taste as good, and they don’t last as long when we ship them. I only fish in areas that meet all those habitat sweet spots: warm, consistent temps, full salinity, plenty of plankton, and the right depth. That’s why my clients come back month after month—they know the Layang Scad I supply is from the best possible habitat, so their customers get a great product.
I also want to touch on sustainability here, because that’s a huge thing for me. Overfishing is a real problem with small pelagics like Layang Scad, but by understanding their habitat, I can target specific schools without wiping out the whole population. I never fish in spawning grounds—those are the areas where the Layang Scad go to lay eggs, usually around 100 meters deep with extra plankton. If I fished there during spawning season (that’s March to April, by the way), I’d be catching juvenile fish and messing with the population. But since I know their habitat, I can stick to feeding grounds where the fish are already mature and ready to be caught. That’s why my catches stay consistent year after year, and I haven’t had to worry about diminishing stocks. It’s not just good for business—it’s the right thing to do.
Now, if you’re a buyer looking to stock up on top-quality Layang Scad, you already know the habitat makes all the difference. Whether you’re a restaurant needing a steady supply for grilled fish specials, a food manufacturer making canned seafood, or a retailer selling fresh fish to customers, the fish from ideal habitat is better in every way. I’ve been in this game long enough to know that you get what you pay for—and the best Layang Scad comes from waters that hit all those sweet spots we talked about.
If you’re ready to chat about orders, minimums, or pricing for your next batch of Layang Scad, just reach out. I’m here to answer any questions you have about the fish, their habitat, or my supply process—no fine print, no hidden fees. I’ll even tell you which of my grounds we caught them on, and what season they’re from, so you can be sure you’re getting the best product possible. Don’t waste time with suppliers who don’t know the first thing about Layang Scad habitat—work with someone who lives and breathes this stuff, and who cares about delivering great fish to your customers.
Moonfish References:
- Fisheries Research Institute of Southeast Asia. (2021). Habitat preferences of Selar Layang (Layang Scad) in tropical coastal waters.
- Global Pelagic Fish Association. (2022). Seasonal shifts in Layang Scad distribution and habitat suitability.
- Local Coastal Ocean Monitoring Program. (2023). Salinity and temperature thresholds for optimal Layang Scad growth.
Changshion Foods Co., Ltd.
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