Guangdong Anglers Take Action: Clearing “Sucker Fish” Infestations! One Man’s 10-Year Battle Against Invasive Species

Fishing for Beginners

February 24, 2026

Guangdong Anglers Take Action: Clearing “Sucker Fish” Infestations! One Man’s 10-Year Battle

Okay, let’s talk about something that’s been flooding my feed and honestly, it’s equal parts fascinating and horrifying. Recently, videos surfaced from Guangdong province showing rivers absolutely teeming with “Sucker Fish” – you might know them as Plecos or “Janitor Fish” – just sunbathing in massive, dark clusters. I’m talking about scenes so dense, they literally look like the water has turned black. It’s wild, and the internet, rightfully so, lost its collective mind.

After I shared one of these videos, the comments section exploded. People were furious, worried, and desperate, flooding the replies with calls to “clean them all up!” and even volunteering to help. It turns out, they weren’t just talking. Local fishing enthusiasts in Guangdong have already mobilized, and one man’s story is nothing short of epic: a decade-long personal crusade, hauling out over 100,000 jin (that’s roughly 50,000 kilograms or 110,000 pounds!) of these invasive pests. Let’s dive into why this is such a big deal, what these anglers are doing, and honestly, what the heck we can do about it.

1. The Anglers Are On The Front Lines

Maybe you haven’t seen the nightmare fuel yet. Picture this: near the Zhongshan Waihai Bridge and the Dongguan Dongjiang Bridge, the shallow water isn’t water anymore—it’s a writhing, seething carpet of dark, armored fish. Some of these suckers (pun absolutely intended) are monstrous, weighing in at 4-5 pounds each, dwarfing their own kind.

Faced with this alien takeover of their local waterways, Guangdong’s anglers said, “Enough is enough.” I’ve seen videos from at least two guys who took matters into their own hands. One, a local blogger from Zhongshan, another a determined fellow from Dongguan. They located these pleco congregations and started hauling them out with legal fishing nets, then burying them for proper disposal.

But the real MVP here is a Mr. Meng from Zhongshan. In an interview, this dedicated fisherman revealed he’s been at this for ten years. “We used to catch these sucker fish all the time while fishing,” he said. “Someone told us how harmful they are, so I’ve been clearing them for almost ten years now… definitely over 100,000 jin in total.”

Let that sink in. Ten years. Over a hundred thousand pounds. That’s a level of persistence that comes from watching your favorite fishing spots get overrun. You start catching more of these armored nuisances than the actual local fish you’re after. The frustration must be unreal. So, he switched tactics, going from casual angler to targeted exterminator, and by sharing his mission online, he’s raised massive awareness.

2. Why Is Everyone Freaking Out About The “Janitor Fish”?

Hold on, you might ask, aren’t they called “cleaner fish”? Don’t they eat algae and keep tanks clean? How did they become public enemy number one?

Great questions! Time for a quick, crucial recap. The Sucker Fish (Hypostomus plecostomus) is native to South America. It was introduced globally as a popular aquarium fish, marketed as the ultimate “tank janitor” because it scours algae and leftover food.

But release it into a local river or lake, and its true, devastating nature is unleashed. It’s an ecological wrecking ball.

The Triple Threat of the Sucker Fish

Here’s why they’re so destructive:

They’re Egg-eating Machines: An adult pleco has a voracious appetite for fish eggs. We’re talking thousands of eggs consumed in a single day. They also happily snack on vulnerable fry (baby fish). They literally eat the future of native fish populations.
They Have No Natural Predators: Their bodies are covered in tough, bony plates. Local predators like snakeheads can’t bite through that armor. With no checks and balances, their population explodes unchecked.
They Outcompete Everyone: They’re not picky eaters. They’ll consume algae, detritus, and the food sources that native bottom-feeders rely on, pushing them out of their ecological niche.

The result? What we see in those videos: entire stretches of water dominated by a single, invasive species, with native fish nowhere to be found. No wonder people are panicking! I’ve had comments from folks in Dongguan asking how to join a cleanup crew, and others brainstorming wild ideas on how to deal with them.

3. The Big Question: Can We Really Get Rid of Them?

So, the anglers are doing their part. But is it enough? Can we actually win this war?

The honest, frustrating answer is: completely eradicating them from large, open water systems is incredibly difficult, maybe impossible. But “control” and “containment” are absolutely achievable goals. We can’t just throw our hands up.

What’s Being Tried (And The Challenges)

People have suggested all sorts of things:

Mass Angling: Mobilize all fishermen to target them. Problem? Many anglers find it pointless—you can’t eat them, and they’re a hassle to handle. The motivation isn’t always there.
Turn Them Into Feed: Process them into chicken, cat, or dog food. Sounds practical, right? But the economics are terrible. Their meat yield is pathetically low (only about 15% of body weight), and processing their rock-hard skeletons is a nightmare. Setting up industrial-scale collection and processing for a low-value product just doesn’t make financial sense. Plus, it could create a perverse incentive for illegal fishing of other species under the guise of “pleco control.”

So, while individual, small-scale use is fine, large-scale commercial solutions are probably a pipe dream. The core strategy has to remain Prevention and Physical Removal.

A Realistic Battle Plan: What Might Work

Instead of dreaming of magic bullets, let’s get practical. A multi-pronged approach is our best shot.

1. Supercharged Physical Removal

Mr. Meng’s method works, but we need to scale it up massively.

Organized Cleanups: This is where fisheries departments need to step in. They could lead regular operations, using sonar and local knowledge to locate winter “pleco pits” where they congregate and conduct large-scale netting operations. The efficiency would dwarf individual efforts.
Volunteer Corps: Create official or community-led “Invasive Species Response” groups. So many people in the comments want to help but don’t know how! Give them a platform, some basic training, and organized events. Harness that public energy and goodwill.

2. Slam The Door Shut: Source Control

Stopping new introductions is non-negotiable. We have to plug the leaks.

Public Education Campaigns: Hammer home the message: “DO NOT RELEASE YOUR PET FISH!” Make it as socially unacceptable as littering. Target aquarium owners, pond keepers, and well-meaning but misguided “mercy release” groups.
Regulate the Trade: Strengthen oversight of pet shops, aquarium stores, and online markets. Clear labeling, warnings, and even restrictions on the sale of high-risk invasive species like plecos are necessary.

3. The Power of Law

We need teeth. Right now, releasing them is illegal, but the laws can be sharper. Plecos are on China’s List of Key Managed Invasive Alien Species. The “Management Measures for Alien Invasive Species” bans unauthorized release, but it’s a broad brush. Some regions are leading the way. For example, Hainan’s regulations explicitly prohibit the “raising, planting, selling, purchasing, transporting, and using” listed species. Making personal ownership legally risky is a powerful deterrent. We need more of that.

4. This Is On All of Us: A Final Thought

Look, this “Sucker Fish” problem isn’t just some abstract ecological issue. It’s about the places we love. Imagine going to your favorite riverbank to fish or just relax, hoping to see a diversity of life, and instead, you’re greeted by a sluggish, armored horde. It kills the vibe, and more importantly, it kills the ecosystem.

That angler’s 10-year, 100,000-pound fight is heroic, but one person can’t hold back the tide. Protecting our waterways is a team sport. It’s about every single one of us making better choices: not buying invasive species as pets, never releasing them, speaking up if we see someone about to, and maybe even joining a cleanup if we can.

I’m curious about your experiences now. Have you ever been “pleco-bombed” while fishing, where these guys swarm your bait and ruin the day? And beyond netting them out, what other clever, realistic ideas do you have to manage these unwelcome guests? The conversation, and the cleanup, has to keep going.