The Environment Agency are aware.

When I saw a post on Instagram recently of a topmouth gudgeon caught in the UK, I’ll be honest, I was quite excited. They’re a pretty nasty little invasive species that have found their way into several waters in England and Wales since the Eighties. They breed four times a year and eat the eggs of native fish, so they’re not a welcome addition to any body of water. Anyway, I’ve always wanted to catch one, so I quickly made some enquiries. Before too long I’d started a conversation with a fellow species hunter named Donny who told me that the Environment Agency are aware of their presence, that the angling association responsible for the water were still permitted to fish the venue, but were no longer allowed to fish matches or use keepnets. Day tickets were available, so we arranged to meet up last Wednesday to go and catch some. As an added unexpected bonus Donny told me that the pond also contained a population of motherless minnow, also known as sunbleak, another non-native species, but one I have caught previously, many years ago.

After driving south on Tuesday night, we visited a local tackle shop the following morning to buy our permits. A short drive later, we arrived at the pond and set about catching some diminutive invaders. It didn’t take us long to start catching lots of them. 

A tiny piece of pinkie on a tanago hook was the presentation of choice, fished under a tiny float. Perfect for small fish with small mouths. 

The topmouth gudgeon seemed to prefer hanging out under floating debris. 

Donny focuses on his tiny float, looking for any sign of movement. Sometimes the float didn’t go under but slowly moved sideways, indicating a fish had taken the bait. 

Before too long, I'd caught my first ever topmouth gudgeon! Also known as the stone moroko.

It was soon followed by a few more. They seem to come in two colourations. One, like my first, with green and purple hues with a lovely pearlescent sheen. The second has silver scales with a black edge, like the one above in my little photo tank.

We fished for a few hours before Donny had to head off, and I fished on for another hour before I called it a day. As well as a few dozen topmouth gudgeon, I also caught a few small rudd, perch and about a dozen motherless minnow.

My first rudd of 2024.

The biggest motherless minnow of the session. I last caught one of these about ten years ago!

I caught my largest topmouth gudgeon of my session shortly after Donny left.

I really enjoyed meeting Donny and fishing together, I was very happy with the way the session had gone, and pleased to have met another tanago rod owner too!

Later in the day, I set off across England in preparation for a visit to a coarse fishery in Lincolnshire the following day. Whilst talking with Donny before the trip, he had mentioned to me there were populations of Prussian carp in a few fisheries there. Yet another non-native species, also known as the Gibel carp and a close relative of both the crucian and the goldfish. The Environment Agency are aware of their presence in the venue I was going to fish, and have also studied specimens gathered from it, confirming their identity. The venue in question is a members only water, but when I spoke to their committee they generously agreed to allow me a one-off visit to target their stock of Prussian carp.

When I arrived last Thursday morning, I was welcomed warmly, told a bit about the history of the venue, taken to a peg that regularly produces Prussian carp, and given a few pointers to help me catch them. I started off fishing maggots on the bottom under a waggler. This produced a few roach, rudd, perch and gudgeon. I love catching gudgeon!

The swim in front of peg nine. Up the left was where I was told to fish.

Plain old gudgeon. Still one of my favourite little fish.

After about three hours it started raining, and I was feeling quite hungry, so I had a break, sitting in the car whilst I ate some lunch. Returning to the peg, I decided to switch over to fishing colourful wafters on a method feeder with 2mm pellets. 

Yummy. Who doesn't like banoffee?

Hair rigged on a bait band. Simple but very effective.

There's something satisfying about a nicely loaded feeder.

Any second now...

I was expecting to have to build up a bed of groundbait before I drew some fish into the area, but on only the second cast, my rod tip twitched a couple of times before being pulled round. A short scrap later, I netted the culprit and began carefully examining it. 

Large scales? Check.
29–33 scales along the lateral line? I counted 31. Check.

Stubby nose? Check.
No barbules? Check.
Silver halo around the pupil? Check.

First ray strongly serrated? Check.
Almost straight or slightly concave dorsal fin. Check.

Anal fin has five and a half soft rays. Check.

A deeply forked tail. Check.

I’d caught my first Prussian carp! Over the next few hours, I caught a few more and a solitary common carp that did its best to get into the vegetation to my left, but I managed to turn it away from them a few times before drawing it over my waiting net. 

A golden common carp.

After catching my twelfth Prussian carp, things went very quiet. I persevered for a while but with a third long drive to do in as many days to get back up the road, I packed up, thanked the guys at the fishery for allowing me the opportunity to fish at their lovely venue for the day, and hit the road. I’m on a bit of a roll at the moment. Adding a Siberian sturgeon to my Scottish Species Tally is my next objective. 

Tight lines, Scott.