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 |
|---|---|---|---|
| 54 cm | 19 Jun 2007 | Maiden Lane | 106430 |
| 31.8 cm | 13 Jun 2013 | Five Arches Business Park | 136480 |
| 31.6 cm | 5 Jun 2024 | Five Arches | 165057 |
| 29.5 cm | 5 Jun 2024 | Five Arches | 165057 |
| 25.4 cm | 2 Oct 2007 | Thames Road | 107314 |
| 25.4 cm | 23 Aug 2005 | Hall Place | 87422 |
| 25.3 cm | 7 Jul 2003 | Maiden Lane | 77482 |
| 24.7 cm | 5 Jun 2024 | Five Arches | 165057 |
| 24.7 cm | 15 Jun 2011 | Maiden Lane | 126555 |
| 24.5 cm | 5 Jun 2024 | Five Arches | 165057 |
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 |
|---|---|---|---|
| Five Arches | 12 Aug 2009 | 5 Jun 2024 | 3 |
| Maiden Lane | 25 May 2001 | 21 May 2024 | 15 |
| Hall Place | 25 Jun 2001 | 18 May 2022 | 8 |
| Five Arches Business Park | 13 Jun 2013 | 13 Jun 2013 | 1 |
| Thames Road | 2 Oct 2007 | 2 Oct 2007 | 1 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
2001–2024
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 286 measured fish were spread across different length ranges.
- Smallest
- 4.1 cm
- Lower quarter
- 11.5 cm
- Median
- 13.7 cm
- Upper quarter
- 17.6 cm
- Largest
- 54 cm
Lengths are direct survey measurements rather than anglers’ catches.
Fish weighed by surveyors
Measured weight summary
Recorded weights were available for 23 perch. This is a subset of the measured fish and may not represent the whole population.
- Lightest
- 0.1 oz (0.002 kg)
- Lower quarter
- 0.9 oz (0.026 kg)
- Median
- 2.4 oz (0.067 kg)
- Upper quarter
- 4.8 oz (0.1365 kg)
- Heaviest
- 8.6 oz (0.244 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 Cray
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 →