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 |
|---|---|---|---|
| 30.9 cm | 9 Apr 2002 | Hawley Meadows | 50240 |
| 30.4 cm | 27 Mar 2003 | Owlsmoor | 75779 |
| 29.1 cm | 9 Apr 2003 | Aldershot | 75806 |
| 29 cm | 25 Apr 2013 | Coleford Bridge | 135909 |
| 28.2 cm | 27 Mar 2003 | Owlsmoor | 75779 |
| 27.4 cm | 27 Mar 2003 | Owlsmoor | 75779 |
| 27.4 cm | 9 Apr 2002 | Hawley Meadows | 50240 |
| 26.7 cm | 27 Mar 2003 | Owlsmoor | 75779 |
| 26 cm | 9 Apr 2003 | Aldershot | 75806 |
| 26 cm | 9 Apr 2002 | Hawley Meadows | 50240 |
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 |
|---|---|---|---|
| Coleford Bridge | 21 Mar 2003 | 6 May 2026 | 5 |
| Hawley Meadows | 5 Dec 1990 | 10 Apr 2025 | 17 |
| Riseley | 4 Apr 2002 | 8 Apr 2025 | 13 |
| Manor Farm Nature reserve | 8 Apr 2025 | 8 Apr 2025 | 1 |
| Downstream Riseley | 23 Sept 1985 | 18 May 2016 | 4 |
| Eversley Cross | 7 Dec 1990 | 10 Apr 2013 | 8 |
| Hollybush Lane | 16 Apr 2003 | 16 Apr 2003 | 1 |
| Aldershot | 9 Apr 2003 | 9 Apr 2003 | 1 |
| Church Farm | 3 Apr 2003 | 3 Apr 2003 | 1 |
| Owlsmoor | 10 Oct 1985 | 27 Mar 2003 | 3 |
| Greenacres | 27 Sept 1985 | 29 Jan 1991 | 2 |
| Downstream Lakeside road | 19 Dec 1990 | 19 Dec 1990 | 1 |
| Downstream Sandhurst Lane | 18 Dec 1990 | 18 Dec 1990 | 1 |
| Upstream Cove Brook | 3 Dec 1990 | 3 Dec 1990 | 1 |
| Upstream A325 Frimley | 30 Nov 1990 | 30 Nov 1990 | 1 |
| Downstream Coleford bridge | 29 Nov 1990 | 29 Nov 1990 | 1 |
| Grove Farm | 23 Nov 1990 | 23 Nov 1990 | 1 |
| 300m Upstream Coleford bridge | 17 Oct 1985 | 17 Oct 1985 | 1 |
| 0.5km Upstream Coleford bridge | 17 Oct 1985 | 17 Oct 1985 | 1 |
| Upstream Loddon | 2 Oct 1985 | 2 Oct 1985 | 1 |
| Eversley Trout Fishery | 30 Sept 1985 | 30 Sept 1985 | 1 |
| Downstream Greenacres | 27 Sept 1985 | 27 Sept 1985 | 1 |
| RAE Riseley | 24 Sept 1985 | 24 Sept 1985 | 1 |
| Downstream Whitewater confluence | 24 Sept 1985 | 24 Sept 1985 | 1 |
| 300m Upstream Swallowfield G/S | 23 Sept 1985 | 23 Sept 1985 | 1 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
1985–2026
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 2,547 measured fish were spread across different length ranges.
- Smallest
- 3.1 cm
- Lower quarter
- 9.8 cm
- Median
- 12.3 cm
- Upper quarter
- 14.6 cm
- Largest
- 30.9 cm
Lengths are direct survey measurements rather than anglers’ catches.
Fish weighed by surveyors
Measured weight summary
Recorded weights were available for 9 roach. This is a subset of the measured fish and may not represent the whole population.
- Lightest
- 0.4 oz (0.012 kg)
- Lower quarter
- 0.7 oz (0.019 kg)
- Median
- 1.4 oz (0.041 kg)
- Upper quarter
- 1.9 oz (0.053 kg)
- Heaviest
- 5.7 oz (0.161 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 Blackwater
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 →