Complete Guide to Catching Gudgeon (Liugen Fish): Tips, Tactics, and Personal Experiences

Let’s cut to the chase—gudgeon (or Liugen fish as it’s known in some regions) is one of the most underrated freshwater catches out there. I’ve spent countless weekends chasing these little fighters in rivers across northern China, and let me tell you: they’re not just “small fish.” These guys are feisty, taste incredible, and once you master their quirks, catching them becomes an obsession. Today, I’m spilling all my secrets—from their weird habits to the exact gear that works (and what doesn’t). Let’s dive in!

What Even Is a Gudgeon? Let’s Break It Down

First off, let’s get the basics straight. Gudgeon isn’t just one fish—it’s a group of small, wild freshwater species in the carp family (Cyprinidae). Think of them as the tiny, tough cousins of carp, but way more fun to catch. Here’s what you need to know:

1. Physical Features: Spotting a Gudgeon in the Wild

These guys are easy to ID once you know what to look for. They’re slender, a bit flattened on the sides, and usually 12–18 cm long (about 5–7 inches) when fully grown. Their backs are dark gray or black, bellies are bright white, and some have a faint black stripe down their spine. Oh, and that tiny black spot at the base of their tail? Total giveaway. Their scales are so small you might not even notice them, and they’re smooth as silk to the touch. Pro tip: If you see a fish darting in shallow water that looks like a mini carp but with a more pointed snout, that’s your gudgeons!

2. Habits: Why They’re Such Fun to Catch

Gudgeon are cold-water lovers—they thrive in temps between 10–25°C (50–77°F). That means you’ll find them in clear, cool rivers, streams, and even mountain brooks. Here’s their vibe:

• They’re school fish—if you catch one, there are 10 more nearby. Perfect for non-stop action!
• They love moving water—look for riffles, shallow bays, or spots where rivers narrow. That’s where they hunt for food.
• They’re voracious eaters—once they find a spot with food, they’ll stay until they’re full (or until they get hooked… oops).
• They’re memory-challenged—if they escape a hook, they’ll be back for more in 10 minutes. No fear here!

Oh, and their diet? They’re omnivores, but they go crazy for anything with a hint of fishy or buggy scent. In the wild, they munch on insects, tiny crustaceans, and algae. In your bait? Let’s just say they’re not picky—more on that later.

3. Where to Find Them: Hotspots Around the World

Gudgeon aren’t just a northern China thing. You’ll find them in:

• Europe (especially rivers in Russia, Poland, and Germany)
• Asia (China’s Heilongjiang River system, Irtysh River)
• Even some parts of North America (though they’re less common there)

But if you’re in Heilongjiang? You’re in gudgeon paradise. These guys are part of the “18 sub-species” in the local “Three Flowers, Five Nets, Eighteen Subs, Seventy-Two Miscellaneous Fish” list—and they’re just as tasty as the more famous “Three Flowers” (like the Amur pike). Don’t sleep on that!

General Seasonal Tactics: Catch Gudgeon Year-Round (Sort Of)

Okay, let’s get to the good stuff—how to actually catch these guys. First, forget the heavy gear. Gudgeon are tiny, so you need to go light, light, light. Here’s my go-to setup:

1. Gear: The Only Setup That Works (Trust Me)

I’ve wasted so much money on fancy gear for gudgeons—don’t make my mistake. Stick to this:

• Main line: 0.2–0.4 lb test (yes, that’s super thin. Thinner than a human hair in some cases!)
• Leader: 0.1–0.3 lb test (even thinner. If it breaks? No big deal—just retie. Gudgeon don’t fight hard enough to snap it… usually.)
• Hook: Size 2–3 sleeve hook (tiny! For spring/winter, go down to size 1—gudgeon are less active then, so smaller hooks = more bites)
• Float: Soft-tail float for “floating” (more on that later). It’s sensitive enough to pick up the tiniest nibble.

Pro tip: If you use a regular float, you’ll miss 90% of the bites. These guys nibble so softly, you need something that moves at the slightest touch.

2. Bait: What They Can’t Resist

Gudgeon are suckers for two things: smell and movement. Here’s what works best:

• Artificial bait (pull bait): This is my #1. It’s a soft, squishy bait that sinks slowly, has good “fog” (it releases tiny particles to attract fish), and stays on the hook. It looks like a tiny bug or worm—perfect for gudgeons.
• Natural bait: Once you have a school of gudgeons, switch to maggots or red worms. They love the real thing, and you’ll get more bites. Just don’t use too much—gudgeon have tiny mouths!

Word of warning: Don’t use bread. It gets mushy, falls off the hook, and gudgeons don’t care. Stick to the two above—you’ll thank me later.

3. Fishing Style: Float Everywhere (Yes, Everywhere)

Gudgeon aren’t bottom feeders—they swim in the middle to top layers of the water. So forget “fishing the bottom” (unless the water is less than 2 meters deep). Here’s how I do it:

• Depth: Start at 70–80 cm (2–3 feet) below the surface. That’s their sweet spot.
• Water over 3 meters deep: Only fish the middle layer (1.5 meters down). They won’t go to the bottom if it’s too deep.
• Water under 2 meters deep: You can fish the bottom too—you might even catch a small carp or crucian carp as a bonus!

Pro move: “Cast and retrieve” quickly. Toss the bait out, let it sink a little, then slowly reel it in. This mimics a bug falling into the water—gudgeon will chase it like crazy.

4. Reading the Float: The Secret to Not Missing Bites

This is make-or-break. Gudgeon have tiny mouths, so their bites are subtle. Here’s what to look for:

• Float lies flat on the water and wiggles away: They’re eating at the top layer!
• Float goes up, then drops fast: Classic bite—set the hook immediately!
• Float sinks 2–3 cm, stops, then wiggles and drops: They’re messing with the bait—wait for the final drop.
• Float gets stuck and doesn’t sink, then wiggles and goes up: They’re holding the bait in their mouth—set the hook!
• Float gets stuck and wiggles non-stop: Same as above—they’re not letting go.

Rule of thumb: If the float doesn’t sink when it should? They’ve got the bait. Set the hook! I’ve missed so many bites waiting for a “big” movement—don’t do that.

Ice Fishing for Gudgeon: My Favorite Winter Obsession

Let’s talk ice fishing—this is where gudgeon fishing gets addictive. In winter, gudgeons hide in deep pools or under ice near river banks. Here’s how I do it:

1. Gear: Ice Fishing Specifics

You don’t need fancy ice rods—just a cheap, light one (they’re like $10). The key is the rig setup:

• Thread a big space bean (or stopper) onto the main line first (it stops the float from sliding too far).
• Add a float seat with a ring (so the float can slide up and down the line—critical for finding the right depth).
• Add another big space bean below the float seat.
• Tie on a swivel (to connect the main line to the leader).

For the float? Use a short ice float (5–10 cm long). Long floats get stuck in the ice hole—trust me, I’ve broken so many.

2. Bait: The “Secret” Winter Bait

Forget maggots—use Yang La Can (okay, I’ll explain: it’s a type of moth cocoon that’s high in protein). When you hook it, it looks like a tiny worm, and as fish bite it, it releases tiny fibers that attract more gudgeons. It’s like a natural bait and a chum bag in one!

If you can’t find Yang La Can? Use red worms—they work too, but not as well. Just don’t use artificial bait in winter—gudgeon are less active, and they want the real thing.

3. Finding the Spot: The Most Important Part

Ice fishing is all about finding the fish. Here’s my rule: if you don’t get a bite in 5 minutes, move. No exceptions. Gudgeons are in schools, so if one spot is dead, another 10 meters away might be packed.

Start by fishing the bottom (drill a hole, drop the bait to the bottom, wait 5 minutes). If no bite? Move the float up 50 cm (so the bait is 50 cm off the bottom). Keep doing this until you get a bite. Once you find the right depth? You’re in for a linking (non-stop bites) fest.

Last winter, I found a spot in Jilin (my hometown) where I caught 40 kg (88 lbs) of gudgeons in 24 hours. No joke—my arms were sore, but it was worth it. These little guys fight so hard for their size—you’ll feel every tug!

Final Thoughts: Why Gudgeon Fishing Is More Than Just Catching Fish

Look, I’ve fished for big carp, trout, even salmon. But gudgeon? They’re different. They’re not about “trophy size”—they’re about the thrill of the bite. The way they chase your bait, the tiny tugs on the line, the rush of catching 10 in 5 minutes… it’s addictive.

And let’s not forget the taste. Gudgeon are packed with protein, low in fat, and taste incredible fried or in soup. My grandma makes the best gudgeon soup—she says it’s “better than any restaurant fish.” I don’t argue.

If you’re new to fishing? Start with gudgeons. They’re easy to catch, don’t require fancy gear, and will teach you the basics of reading water, choosing bait, and setting hooks. If you’re a seasoned angler? Give them a try—you’ll be surprised how much fun they are.

So grab your light line, tiny hooks, and head to the nearest cool river. And if you find a school? Don’t forget to tell me— I’ll be right there with my ice rod (or regular rod, depending on the season).