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.
| Length | Survey date | Survey location | Survey ID |
|---|---|---|---|
| 74 cm | 4 Jun 2014 | Belmesthorpe Meadow | 141010 |
| 73 cm | 16 Jun 2015 | Foundry Road | 144978 |
| 70 cm | 16 Jun 2014 | Ingthorpe | 142428 |
| 70 cm | 5 Jun 2014 | Foundry Road | 141008 |
| 70 cm | 4 Jun 2014 | Belmesthorpe Meadow | 141010 |
| 68 cm | 4 Jun 2014 | Belmesthorpe Meadow | 141010 |
| 68 cm | 24 Jun 2013 | Belmesthorpe Meadow | 137453 |
| 68 cm | 26 Nov 2007 | Upstream White Post Bridge | 108691 |
| 67 cm | 15 May 2015 | Flow Project - Upstream Gt. Casterton STW | 144707 |
| 67 cm | 14 May 2015 | Downstream Ryhall STW Flow project site | 144784 |
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 surveyed | First recorded | Last recorded | Visits finding european eel |
|---|---|---|---|
| Foundry Road | 13 Mar 1990 | 17 Aug 2023 | 13 |
| Upstream White Post Bridge | 12 Mar 1990 | 15 Aug 2023 | 13 |
| Church bridge - u/s Empingham | 16 Mar 1990 | 5 Jul 2023 | 9 |
| Flow Project - Upstream Gt. Casterton STW | 15 May 2015 | 12 Sept 2018 | 4 |
| Belmesthorpe Meadow | 12 Mar 1990 | 7 Sept 2018 | 9 |
| Flow Project - DS Great Casterton STW | 15 May 2015 | 2 Nov 2015 | 2 |
| Great Casterton | 14 Mar 1990 | 18 Jun 2015 | 6 |
| Upstream Ryhall STW - Flow project Site | 14 May 2015 | 14 May 2015 | 1 |
| Downstream Ryhall STW Flow project site | 14 May 2015 | 14 May 2015 | 1 |
| Ingthorpe | 1 Aug 2006 | 16 Jun 2014 | 5 |
| Downstream North Brook | 15 Mar 1990 | 26 Jun 2013 | 4 |
| Downstream Ingthorpe Road Bridge | 14 Mar 1990 | 25 Jun 2013 | 4 |
| Shacklewell Lodge Ingthorpe | 26 Mar 1990 | 17 May 2012 | 3 |
| Friths Farm | 13 Mar 1990 | 5 Jul 2011 | 6 |
| Tolethorpe | 2 Aug 2006 | 2 Aug 2006 | 1 |
| Newstead Mill | 19 Mar 1990 | 3 Apr 1996 | 3 |
| Little Casterton | 15 Mar 1990 | 3 Apr 1996 | 3 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
1990–2023
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 609 measured fish were spread across different length ranges.
- Smallest
- 10 cm
- Lower quarter
- 31 cm
- Median
- 40.1 cm
- Upper quarter
- 51.5 cm
- Largest
- 74 cm
Lengths are direct survey measurements rather than anglers’ catches.
Fish weighed by surveyors
Measured weight summary
Recorded weights were available for 3 european eel. This is a subset of the measured fish and may not represent the whole population.
- Lightest
- 3.2 oz (0.09 kg)
- Lower quarter
- 3.7 oz (0.105 kg)
- Median
- 4.2 oz (0.12 kg)
- Upper quarter
- 9 oz (0.254 kg)
- Heaviest
- 13.7 oz (0.388 kg)
These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.
More fish in this river
Explore the River Gwash
Compare other species with enough survey and measurement data for a detailed page.
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 →