Individual EA measurements
Largest measured gudgeon
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 |
|---|---|---|---|
| 14.7 cm | 12 Sept 2017 | Twickenham | 151602 |
| 14.6 cm | 6 Sept 2017 | Harlequins | 151601 |
| 14.5 cm | 8 Oct 2018 | Harlequins | 153766 |
| 13.9 cm | 12 Sept 2017 | Twickenham | 151602 |
| 13.8 cm | 12 Sept 2017 | Twickenham | 151602 |
| 13.8 cm | 6 Sept 2017 | Harlequins | 151601 |
| 13.6 cm | 6 Sept 2017 | Harlequins | 151601 |
| 13.5 cm | 8 Oct 2018 | Harlequins | 153766 |
| 13.5 cm | 12 Sept 2017 | Twickenham | 151602 |
| 13.4 cm | 17 Sept 2019 | Harlequins | 155689 |
Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.
Explore the river
Where gudgeon were found
Each point marks a survey location with at least one gudgeon 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 gudgeon |
|---|---|---|---|
| Riverside Walk | 25 May 2005 | 10 Oct 2024 | 6 |
| Hatton Road | 14 Oct 2022 | 8 Oct 2024 | 3 |
| Twickenham | 12 Sept 2017 | 17 Sept 2019 | 3 |
| Harlequins | 6 Sept 2017 | 17 Sept 2019 | 3 |
| Mill Platt | 6 Oct 2005 | 4 Oct 2017 | 3 |
| Moor Lane | 15 Jun 2000 | 5 Sept 2017 | 4 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
2000–2024
Survey records by year
Each bar shows how many survey visits recorded gudgeon that year.
Fish measured by surveyors
Measured length distribution
See how the 1,309 measured fish were spread across different length ranges.
- Smallest
- 1.9 cm
- Lower quarter
- 6.6 cm
- Median
- 8.2 cm
- Upper quarter
- 9.5 cm
- Largest
- 14.7 cm
Lengths are direct survey measurements rather than anglers’ catches.
More fish in this river
Explore the River Duke of Northumberland
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 →