Individual EA measurements
Largest measured roach
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 |
|---|---|---|---|
| 25.5 cm | 15 May 1996 | Upstream Riverside STW | 104006 |
| 25.5 cm | 15 May 1996 | Upstream Riverside STW | 104006 |
| 25 cm | 25 Oct 2005 | Hacton Lane | 87372 |
| 24.4 cm | 15 May 1996 | Upstream Riverside STW | 104006 |
| 23.8 cm | 15 May 1996 | Upstream Riverside STW | 104006 |
| 23.7 cm | 15 May 1996 | Upstream Riverside STW | 104006 |
| 23.4 cm | 15 May 1996 | Upstream Riverside STW | 104006 |
| 23.4 cm | 15 May 1996 | Upstream Riverside STW | 104006 |
| 23 cm | 2 May 2000 | Hacton Lane | 103417 |
| 22.9 cm | 15 May 1996 | Upstream Riverside STW | 104006 |
Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.
Explore the river
Where roach were found
Each point marks a survey location with at least one roach 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 roach |
|---|---|---|---|
| Hacton Lane | 16 Apr 1996 | 30 Apr 2024 | 7 |
| Squadrons Approach | 19 Oct 2005 | 30 Oct 2018 | 2 |
| Cockabourne Bridge | 25 May 2012 | 25 May 2012 | 1 |
| Upminster Golf Course | 25 Apr 1996 | 11 Nov 2005 | 4 |
| Upstream Riverside STW | 15 May 1996 | 15 May 1996 | 1 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
1996–2024
Survey records by year
Each bar shows how many survey visits recorded roach that year.
Fish measured by surveyors
Measured length distribution
See how the 166 measured fish were spread across different length ranges.
- Smallest
- 3.2 cm
- Lower quarter
- 6.3 cm
- Median
- 12.6 cm
- Upper quarter
- 16 cm
- Largest
- 25.5 cm
Lengths are direct survey measurements rather than anglers’ catches.
More fish in this river
Explore the River Ingrebourne
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 →