Individual EA measurements
Largest measured minnow
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 |
|---|---|---|---|
| 10.6 cm | 11 Oct 2002 | Amwell Loop | 72635 |
| 9.1 cm | 27 Sept 2005 | Wheathampstead | 86587 |
| 9.1 cm | 26 Aug 2005 | Amwell Loop | 85987 |
| 9.1 cm | 26 Aug 2005 | Amwell Loop | 85987 |
| 9 cm | 8 Sept 2004 | Wheathampstead | 82127 |
| 8.5 cm | 22 Sept 2004 | Amwell Loop | 82419 |
| 8.5 cm | 11 Oct 2002 | Amwell Loop | 72635 |
| 8.3 cm | 26 Aug 2005 | Amwell Loop | 85987 |
| 8.2 cm | 27 Sept 2005 | Wheathampstead | 86587 |
| 8.2 cm | 26 Aug 2005 | Amwell Loop | 85987 |
Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.
Explore the river
Where minnow were found
Each point marks a survey location with at least one minnow 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 minnow |
|---|---|---|---|
| Amwell Loop | 12 Apr 1978 | 23 Jul 2026 | 20 |
| Fishers Green | 6 Sept 1978 | 7 Jul 2026 | 16 |
| Wheathampstead | 18 Oct 2002 | 9 Jun 2026 | 19 |
| Hackney Marshes | 11 Nov 2003 | 11 Sept 2025 | 6 |
| Waterdale | 31 Oct 2003 | 31 Jul 2025 | 10 |
| Red Spinners Bayford | 4 Aug 2017 | 17 Jul 2025 | 5 |
| Stanborough Park | 10 Sept 2003 | 24 Jun 2025 | 11 |
| Hyde Mill | 9 Oct 2002 | 17 Jun 2025 | 11 |
| Woolmers Park | 12 Sept 2003 | 3 Aug 2023 | 9 |
| Fallowfield | 16 Sept 2021 | 16 Sept 2021 | 1 |
| Hartham Leisure centre | 24 Jun 2019 | 24 Jun 2019 | 1 |
| Riddy Lane Allotments | 18 Jun 2019 | 18 Jun 2019 | 1 |
| Riddy Lane Allotments | 18 Jun 2019 | 18 Jun 2019 | 1 |
| Hartham Common | 22 Aug 2003 | 21 Jun 2018 | 12 |
| Kings Weir - Weirpool | 2 Jun 2015 | 2 Jun 2015 | 1 |
| Kings Weir | 2 Jun 2015 | 2 Jun 2015 | 1 |
| Batford | 19 Jun 2014 | 19 Jun 2014 | 1 |
| Kings Weir Back Loop | 14 May 2013 | 29 May 2014 | 2 |
| Essendon | 11 Sept 2003 | 26 Jun 2013 | 8 |
| Waterend | 8 Mar 1978 | 17 Apr 2008 | 2 |
| Bush hall | 27 Nov 2007 | 27 Nov 2007 | 1 |
| Limbry Park | 10 May 2006 | 10 May 2006 | 1 |
| Bayford | 15 Sept 2004 | 15 Sept 2004 | 1 |
| Hertford County Hall AS | 28 Nov 2003 | 28 Nov 2003 | 1 |
| Hertford Football Ground | 29 Mar 1978 | 29 Mar 1978 | 1 |
| Water Hall Farm | 22 Mar 1978 | 22 Mar 1978 | 1 |
| Downstream Cecil Saw Mills | 15 Mar 1978 | 15 Mar 1978 | 1 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
1978–2026
Survey records by year
Each bar shows how many survey visits recorded minnow that year.
Fish measured by surveyors
Measured length distribution
See how the 1,271 measured fish were spread across different length ranges.
- Smallest
- 1 cm
- Lower quarter
- 5 cm
- Median
- 5.6 cm
- Upper quarter
- 6.3 cm
- Largest
- 10.6 cm
Lengths are direct survey measurements rather than anglers’ catches.
More fish in this river
Explore the River Lee
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 →