Individual EA measurements
Largest measured perch
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 |
|---|---|---|---|
| 35.6 cm | 17 Sept 2024 | Branch Bridge | 167139 |
| 30.5 cm | 15 Sept 2015 | Prickwillow | 146435 |
| 29.8 cm | 20 Nov 1990 | Mildenhall | 29811 |
| 28.8 cm | 20 Nov 1990 | Mildenhall | 29811 |
| 28.8 cm | 31 May 1990 | Branch Bridge | 30051 |
| 28.5 cm | 20 Oct 2004 | Riverside Cottage Mildenhall | 83156 |
| 28.3 cm | 5 Jun 1990 | Prickwillow | 30151 |
| 28.3 cm | 31 May 1990 | Branch Bridge | 30051 |
| 28.1 cm | 5 Sept 2013 | Wamil Hall | 138385 |
| 27.8 cm | 31 May 1990 | Branch Bridge | 30051 |
Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.
Explore the river
Where perch were found
Each point marks a survey location with at least one perch 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 perch |
|---|---|---|---|
| Branch Bridge | 2 May 1990 | 17 Sept 2024 | 17 |
| Prickwillow | 4 Jun 1990 | 11 Sept 2024 | 16 |
| Wamil Hall | 23 Nov 1990 | 5 Sept 2024 | 7 |
| Mildenhall | 20 Nov 1990 | 4 Sept 2024 | 9 |
| Isleham Lock | 12 Nov 1990 | 14 Sept 2015 | 12 |
| Judes Ferry | 28 Nov 1990 | 20 Sept 2012 | 5 |
| East Fen Isleham | 6 Dec 1990 | 14 Sept 2010 | 11 |
| Riverside Cottage Mildenhall | 20 Oct 2004 | 20 Oct 2004 | 1 |
| Kings Staunch | 19 Jan 2001 | 19 Jan 2001 | 1 |
| Lark Grange | 15 Nov 1990 | 25 Jul 2000 | 4 |
| Baskey Bay | 22 Nov 1990 | 5 Jul 2000 | 4 |
| Isleham Backwater | 30 Nov 1990 | 28 Jun 2000 | 4 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
1990–2024
Survey records by year
Each bar shows how many survey visits recorded perch that year.
Fish measured by surveyors
Measured length distribution
See how the 2,882 measured fish were spread across different length ranges.
- Smallest
- 1.8 cm
- Lower quarter
- 8.3 cm
- Median
- 9.3 cm
- Upper quarter
- 10.8 cm
- Largest
- 35.6 cm
Lengths are direct survey measurements rather than anglers’ catches.
More fish in this river
Explore the River DS Lark
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 →