Fishing the Ebro at Mequinenza and Caspe: the fish, the licences, and the plan

What and where it is

The Ebro is Spain's largest river. The stretch anglers travel for is the chain of dammed reservoirs in its lower-middle reaches: the huge Mequinenza reservoir (the "Sea of Aragón"), Riba-roja below it, and the Caspe reservoir on the Guadalope arm. Big, slow, warm, food-rich water that grows enormous fish.

The Ebro rises in the Cantabrian mountains and runs south-east across northern Spain to its delta on the Mediterranean. The fishing destination is the dammed lowland section either side of the Aragón–Catalonia border. The Mequinenza dam backs the river up into a vast reservoir locals call the Mar de Aragón, the Sea of Aragón, and below it the Riba-roja reservoir runs on toward Flix and Benifallet before the river opens out to the delta. The Caspe reservoir sits on the Guadalope, a tributary that feeds the same system.

What makes it special is the combination: a warm, slow, nutrient-rich river that was stocked with wels catfish decades ago and let them grow without check. The result is some of the biggest freshwater fish in Europe, in water that fishes from spring well into autumn.

The towns are the bases. Mequinenza, where the Segre and the Cinca join the Ebro, has produced some of the largest catfish in Spain and is the headline catfish town. Caspe is the all-round base on the reservoir of the same name. Riba-roja, Flix and Benifallet sit downstream on the Catalan side and are popular for carp as well as catfish. The reservoirs are reached easily from Barcelona, Zaragoza or Reus airports.

One thing to fix in your head before anything else: the river crosses a regional border here, and the fishing licence is regional. Mequinenza and Caspe are in Aragón; Flix and Benifallet are in Catalonia. The two regions issue separate licences, valid only in their own region (see licences below). Most visitors never deal with this because their guide handles it, but it is the first thing that trips up anyone fishing independently.

The fish, and where, when and how to catch each

Wels catfish are the headline, regularly over 2 m, fished from a boat on heavy gear. Carp are a strong second draw, in good numbers at 6 to 12 kg-plus, from bank and boat. Zander shoal in the reservoirs and take lures and jigs. Largemouth bass, perch and barbel fill out the system. The cards below give where, when and how for each.

Others, for context. The system also holds largemouth bass, perch and barbel. Bass and zander are popular lure targets on the reservoirs; barbel are a native river fish. They are not what most visiting anglers travel here for, so the three cards above are the trip. If you want a bass-led trip, the soft-plastic methods on the drop shot page are the place to start, and ask your operator which arm fishes best.

I have set each species out as a card. Read the one for the fish you want, then check the seasonal section for how the fishing moves through the year, and follow the rig link to build the method. Read the "what you can keep" section before you do anything with a catfish or a zander.

Wels catfish (siluro). Regularly over 2 m and 80 kg in this system; the Spanish record is a fish of 2.81 m and around 130 kg, caught on the Ebro in October 2025. Fish over 100 kg are landed in the Mequinenza and Caspe stretches in a normal season. They are legally classed as invasive and must be killed on capture, not returned (see what you can keep); in practice most guided trips photograph and release. (Source: caspe-fishing.com, ontheebro.co.uk and the Ebro guide operators; Spanish invasive-species law; Spanish record reported October 2025.)

Common carp (carpa). Good stocks of 6 to 12 kg-plus, with bigger fish present. The Ebro is a serious carp destination in its own right, not just a catfish water, and carp are the realistic target for an angler without a guided boat day. Carp are not invasive here and the keep rules differ by region; check the local size and bag limits before keeping one.

Zander (lucioperca). A hard-fighting shoal fish, smaller than the cats but a proper sport target on lighter lure gear, holding around structure and the drop-offs. Like the catfish, zander is legally classed as invasive in Spain and must be killed on capture, not returned (see what you can keep).

How the fishing changes by season

The Ebro fishes a long warm-water season. Catfish run from spring through autumn, best in the warm months from roughly May to October. Carp fish much of the year and feed hard in the warmth. Zander prefer the cooler, lower-light spells. Summer fishing leans on dawn, dusk and the night in the heat.

The strip shows the broad arc, not legal open seasons. Exact dates depend on the region and any controlled stretch, so re-check whether a seasonal restriction applies on the stretch you fish before you travel. Here is the year in plain terms.

• Spring (March to May). The water warms and the catfish switch on, building toward the main season. Carp feed up. Zander still fish well in the cooler early-spring spells. A good window as the crowds are thinner.
• Early summer (May and June). The catfish season is properly open and consistent. Carp feeding is strong. This is a prime stretch before the deep heat.
• High summer (July and August). The headline catfish months, but the days are hot, so the fishing leans on the early morning, the evening and the night. Carp fish early and late. Zander is the quiet one now, best at first and last light.
• Autumn (September and October). Catfish stay consistent into the autumn before the water cools. Zander improves as the light drops and the water cools. Often a comfortable, productive window.
• Late autumn and winter (November to February). Catfish slow as the water cools. Zander and carp can still be fished in the milder spells, and this is the cooler-water zander season, but the headline big-fish fishing is a warm-season game.

What you can keep (and the rule that catches everyone out)

This is the unusual part. Wels catfish and zander are legally classed as invasive in Spain and, by law, an invasive fish must be killed on capture, not returned. That is the opposite of the catch-and-release instinct most anglers arrive with, and it sits awkwardly with the photo-and-release practice on most guided trips. Carp are not invasive, but the keep rules differ by region.

This matters more than any other rule on the page, so it is worth being exact, and worth saying plainly where the law and common practice part company.

The law. Under Spain's national invasive-species regime (Real Decreto 630/2013) and the Catalan Resolution ARP/259/2025, species listed as invasive must not be returned to the water alive. Wels catfish and zander are both on that footing here. Read strictly, that means a catfish or a zander you catch should be killed, not released. (Source: Real Decreto 630/2013; Resolution ARP/259/2025; regional fisheries.)

What actually happens. In practice, a great deal of the Ebro's guided fishing is built on catching a giant catfish, photographing it and releasing it, which is what most visiting anglers want and expect. So there is real tension between the letter of the law and the way the fishery is run on the ground. I am not going to tell you which way to play it. What I will tell you is: this is a genuine legal point, it varies by region and is subject to change, and the people who can tell you exactly how it is handled on the stretch you are fishing are your guide or operator and the current regional regulation. Ask them before you go, and follow what they tell you.

Whatever you do, handle fish in wet hands, and clean and dry your kit between waters so you do not move invasive species or disease from one water to the next. That last point is the whole reason the rule exists.

Licences and the rules that matter

You need a regional freshwater licence, and which one depends on where you fish. Aragón (Mequinenza, Caspe) and Catalonia (Flix, Benifallet) issue separate licences, each valid only in its own region. The Catalan licence is inexpensive and bought online. Controlled stretches may need an extra daily permit. Most visitors let their guide handle all of it.

The split-licence point first. This is the part to understand. A licence is issued by the autonomous community, not nationally, and it is valid only in that community:

• Aragón covers the upper and middle Ebro, including the Mequinenza reservoir (the Sea of Aragón) and Caspe.
• Catalonia covers the lower Ebro, including Flix and Benifallet.

If your trip crosses the border, or you are not sure which side your swim is on, that is a question for your operator. (Source: regional fisheries; portmassaluca.com.)

Catalan freshwater licence prices

As of 2026, bought online (source: portmassaluca.com, tomscatch.com, Catalan fisheries):

The Aragonese licence (for Mequinenza and Caspe) is bought separately through the Aragón regional system (INAGA) and is also inexpensive: around €11.51 for a year online, with a 15-day temporary option at about €7.70, valid only in Aragón. There is also an inter-regional licence (about €25 a year) covering several communities; confirm the current Aragón tariff with your operator or the Aragón authority before you buy, as the prices in the table above are the Catalan figures. Controlled stretches (cotos) may need an extra daily permit on top of the licence. (Source: portmassaluca.com; tomscatch.com; Aragón fisheries (INAGA), as of 5 June 2026.)

How to get it

• The simplest route is to book a guide. Most visiting anglers do, and the operator supplies the boat, the tackle and the licence, so you never touch the regional systems yourself. Confirm the licence is included when you book.
• Fishing independently? Buy the licence for the correct region online before you travel: the Catalan licence through the Catalan fisheries system, the Aragonese licence through the Aragón system. Carry it while you fish.
• Check whether your stretch is a coto (a controlled stretch) needing an extra daily permit, and buy that too.

Sizes, bag limits and seasons

These are set regionally and differ between Aragón and Catalonia, and a controlled stretch can carry its own rules. Carp keep rules differ by region, so check the local size and bag limits before keeping one. Catfish and zander are governed by the invasive-species rule above. Re-check whether any seasonal restriction applies on the controlled stretch you fish. Because these vary by region and by stretch, the reliable source is your operator and the current regional regulation, not a single number on a page. (Source: regional fisheries; Catalan/Aragonese authorities, as of 5 June 2026.)

Where to fish

A boat is how the catfish are fished, and guide operators run from Mequinenza, Caspe, Riba-roja, Flix and Benifallet. Bank fishing works for carp and catfish from the reservoir margins and riverbanks. The headline catfish water is the deep channels and dam walls; carp come from the bays and inflowing arms.

These are the bases and what each is known for, from the atlas roster and the operators who run there:

• Mequinenza (Aragón). Where the Segre and Cinca meet the Ebro, and the headline catfish town. Some of the largest cats in Spain come from this stretch. The base for a serious catfish trip. Reached easily from Barcelona, Zaragoza or Reus.
• Caspe (Aragón). The all-round base, on the Caspe reservoir on the Guadalope arm. Good for catfish, carp and zander, with plenty of guided operators.
• Riba-roja (Aragón/Catalonia border). The reservoir below Mequinenza, fished for catfish and carp.
• Flix (Catalonia). A village the river wraps around on both sides, known for wels catfish and carp, with package operators based there.
• Benifallet (Catalonia). Lower down toward the delta, a popular catfish and carp base.

What the water means for method

• The deep channels, the dam walls and the snaggy margins: catfish country. A heavy catfish rig on the bottom or under a float, almost always from a boat.
• The bays, the inflowing arms and the reservoir margins: carp water you can fish from the bank. A carp hair rig behind a feeder or a running lead.
• Structure and drop-offs in the reservoirs: where zander shoal. A vertical jig from a boat over a holding shoal, or a drop shot from the bank.

Bank vs boat, and the time of day

The catfish fishing is a boat game, so for the headline fish you book a guided boat. Carp are the realistic bank target, from the reservoir margins and bays, fishable day and night. Zander come from a boat over the shoals, or from the bank on a drop shot in low light. In summer heat, fish dawn, dusk and the night.

Plain version: if you want a giant catfish, book a guided boat, because that is how it is done here. If you have come for the carp, the bank is genuinely good and you can fish it yourself with a regional licence. For zander, a boat over the shoals is the edge, but a drop shot from the bank in low light will catch. In the summer heat, the early morning, the evening and the night out-fish the bright middle of the day for everything.

This table is the core decision the trip turns on. It lives on the cheat sheet too. Read it as: pick your fish, pick where you are and when, and it gives you the rig.

The boat: guided trips and operators

Most Ebro trips are guided. Operators run from Mequinenza, Caspe, Riba-roja, Flix and Benifallet and supply the boat, the tackle and the licence, which is the simplest way onto the catfish and the way to handle the regional rules. Day rates vary and many sell multi-night packages, so the links below are the ones to book through.

A guided boat is what opens up the big catfish, and the operator handling the licence and the invasive-species question is worth a great deal on a first visit. Book directly. (No day rate is quoted here where the operator prices on request or by package; the link is the way to get a current quote.)

Operators to book

From the atlas roster and the operators' own sites, as of 5 June 2026:

• Caspe Fishing – guided catfish and carp fishing on the Caspe and Ebro reservoirs. caspe-fishing.com.
• On The Ebro – based at Flix, specialising in wels catfish and carp; sells multi-night packages (the website lists package prices by group size and length of stay rather than a day rate). Contact through the site. ontheebro.co.uk.
• Port Massaluca – a fishing and accommodation base on the Riba-roja reservoir, and a good source for the licence and regulation detail. portmassaluca.com.
• Tom's Catch listed operators – tomscatch.com lists bookable Ebro catfish and zander guides across Mequinenza, Caspe and the Catalan stretches, with their own rates.
• Ebro Radical Fishing and other Mequinenza and Caspe guides run the same waters; ask which arm and method suits your dates.

Confirm with the operator: the day rate or package price, whether the licence is included, and exactly how they handle the invasive-species rule for catfish and zander on the stretch you fish.

Where to stay (and book the trip)

The simplest plan is a fishing package that includes the lodge, the boat and the licence, sold by the operators above from Mequinenza, Caspe, Flix and Benifallet. For an independent trip, there is accommodation in each base town and at fishing resorts like Port Massaluca on the Riba-roja reservoir, so you can stay on the water.

Stay on the water

• Port Massaluca, Riba-roja reservoir – a fishing resort and marina on the reservoir, with accommodation, so you can stay and launch in one place. portmassaluca.com.
• On The Ebro, Flix – lodge-and-fishing packages on the river at Flix. ontheebro.co.uk.
• Caspe and Mequinenza – the operators above and other camps run lodge-based packages in and around the towns; book the package and the accommodation comes with it.
• Independent stays – Mequinenza, Caspe, Flix and Benifallet all have hotels, apartments and campsites for a self-guided carp trip, within easy reach of the bank fishing.

If you are fishing independently rather than on a package, base yourself in the town for the region whose licence you hold (Mequinenza or Caspe in Aragón; Flix or Benifallet in Catalonia), so your accommodation and your licence match the water.

The methods, and the rigs to build them

Four rigs cover the Ebro. The catfish rig is the heavy running leger and float paternoster for the big cats. The carp hair rig presents a boilie or corn off the hook. The vertical jig is the boat method for zander over the shoals, and the drop shot takes zander from bank or boat. Each links to its own build page.

Map of fish, where and when, to a rig. The build instructions and the knots live on the rig pages, so I link rather than repeat them.

• Wels catfish, from a boat (or the deep bank), warm months → catfish rig. A heavy running leger laying a bait on the bottom, or a float paternoster holding it off the bottom, both on a strong trace of heavy mono, coated braid or wire. The strong trace is the one thing you never skimp on, because a big cat tests every link.
• Carp, from the bank or a boat, much of the year → carp hair rig. A boilie or grains of corn on a short hair off the bend of the hook, fished behind a method or open-end feeder or a running lead, over bait. The standard carp rig, and the one to learn first.
• Zander from a boat over a shoal in deep water → vertical jig. A jighead and a bigger soft plastic dropped straight down and worked with a lift-and-drop, keeping contact in deep water.
• Zander from the bank (or boat) in low light → drop shot. A bigger soft plastic hovering off the bottom on a dropper, worked slowly. The bank route to a zander, and a flexible reservoir rig.

Build your kit (the kit builder and the shopping list)

Pick your fish and whether you are on the bank or in a boat, and the kit builder trims the shopping list and the rigs to exactly what you need. A guided catfish trip needs almost nothing from you (the operator supplies it); a self-guided carp or zander trip wants one or two outfits and a small terminal box. The full list is below, grouped, with no brands and no prices.

If you are booking a guided catfish trip, the operator supplies the rods, reels, traces, hooks, bait and the boat. Bring: comfortable clothing for long days, strong sun protection (a hat, sunglasses, high-factor cream), wet-weather gear, sturdy footwear, a camera or phone for the photo, and any personal medication. Confirm with the operator what, if anything, you should bring.

That is the whole list. A guided catfish trip needs only the personal items; a self-guided trip wants the relevant outfit and a small terminal box. Buy generic sizes and types; you do not need a named brand to catch a fish.

A trip checklist

Before you go: decide your fish and whether you want a guided boat, book the operator (and confirm the licence is included), or buy the right regional licence yourself. Read the invasive-species rule and ask your operator how they handle it. Pack the kit for your trip type. Then print the cheat sheet and take it with you.

Do this in order:

1. Decide the fish and the format. A giant catfish means a guided boat. A carp week can be self-guided from the bank. Zander suits either. The "what's on" strip above shows the strong months.
2. Book the operator, or buy the licence. Booking a guide is the simplest route, and they supply the boat, tackle and licence. Fishing independently, buy the licence for the correct region (Aragón for Mequinenza and Caspe; Catalonia for Flix and Benifallet) before you travel, and check whether your stretch needs an extra coto permit.
3. Read the invasive-species rule, and ask your operator. Catfish and zander are legally invasive and, by law, must be killed on capture, not returned. Practice on guided trips is usually photo-and-release. Ask your operator and check the current regional regulation, and follow what they tell you.
4. Pack the kit for your trip type. Guided catfish: clothing, sun protection, camera, the operator supplies the rest. Self-guided: the relevant outfit and a small terminal box. The shopping list above (trimmed by the kit builder) is your packing list.
5. Check the local sizes, limits and seasons. Carp rules differ by region; check before keeping a fish. Re-confirm any seasonal restriction on your stretch.
6. Clean and dry your kit before and after, so you do not move invasive species between waters. Then print the cheat sheet and fold it into the box. Get the printable cheat sheet

Common mistakes

The big ones: arriving with the wrong region's licence, not knowing the invasive-species kill rule, expecting to catch a giant catfish from the bank without a boat, fishing the bright middle of a hot summer day, and bringing light tackle to a fish that snaps it. None is hard to avoid once you know.

• Buying the wrong region's licence. The river crosses the Aragón–Catalonia border and the licence is regional and valid only in its own region. Mequinenza and Caspe are Aragón; Flix and Benifallet are Catalonia. Buy for the region you are fishing, or let your guide handle it.
• Not knowing the kill rule. Catfish and zander are legally invasive and, by the letter of the law, must be killed, not returned. Most guided trips photograph and release. Do not assume; ask your operator and check the current regional regulation before you go.
• Expecting a giant catfish from the bank. The big cats are a boat game here. Book a guided boat for the headline fish. The bank is genuinely good for carp, which is the realistic self-guided target.
• Fishing the middle of a hot summer day. In July and August the heat shuts the fishing down in the middle of the day. Fish dawn, dusk and the night, and rest in between.
• Bringing light tackle to a big fish. A wels over 2 m tests every link. The strong trace, heavy lead and big hook on the catfish rig are not optional. Match the gear to the fish the water actually holds.
• Skipping the coto permit. Some controlled stretches need an extra daily permit on top of the licence. Check whether your stretch is one before you fish it.
• Moving kit between waters dirty. The invasive rule exists because these fish spread. Clean and dry your gear between waters.

Frequently asked questions

The questions travelling anglers ask most about the Ebro at Mequinenza and Caspe: what is here, the invasive-species kill rule, the split regional licence, the prices, the best time, bank versus boat, how big the catfish get, whether to book a guide, the rigs, and what you can keep.