RiverFish

European eel · Anguilla anguilla

European eel in the River Tees Barrage

Largest measured european eel: 33 cm

The largest european eel measured in Environment Agency surveys of the River Tees Barrage was 33 cm, recorded at Warm up pool on 13 August 2018.

Across 1,034 measured european eel, the median measured length was 6.8 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Tees Barrage.

See european eel records across England →

Most recent observation19 May 2026Warm up pool
Largest measured european eel
33 cm
Median length
6.8 cm
Fish measured
1,034
Survey locations
2

Individual EA measurements

Largest measured european eel

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
33 cm13 Aug 2018Warm up pool153043
28.5 cm4 Jun 2019Warm up pool154674
9.3 cm18 May 2010Tees Barrage Elver Pass 2010121564
9.1 cm28 Apr 2010Tees Barrage Elver Pass 2010121436
9 cm2 Nov 2023Warm up pool163948
9 cm2 Nov 2023Warm up pool163948
9 cm2 Nov 2023Warm up pool163948
8.8 cm18 May 2010Tees Barrage Elver Pass 2010121564
8.8 cm1 Apr 2010Tees Barrage Elver Pass 2010121309
8.6 cm28 Apr 2010Tees Barrage Elver Pass 2010121436

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where european eel were found

Each point marks a survey location with at least one european eel record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding european eel
Warm up pool13 Aug 201819 May 20265
Tees Barrage Elver Pass 201024 Mar 20108 Jun 201014

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2010–2026

Survey records by year

Each bar shows how many survey visits recorded european eel that year.

Fish measured by surveyors

Measured length distribution

See how the 1,034 measured fish were spread across different length ranges.

Smallest
5.6 cm
Lower quarter
6.5 cm
Median
6.8 cm
Upper quarter
7.1 cm
Largest
33 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Tees Barrage

Compare other species with enough survey and measurement data for a detailed page.

Roach Dace Perch Common bream Chub

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →