River Main Allen
13 fish species have been recorded at 19 locations along the River Main Allen.
- Fish species
- 13
- Places surveyed
- 19
- Survey visits
- 173
- Records span
- 1980–2025
Local EA evidence
Where fish were recorded
Choose a point on the map to see what was recorded there.
Check local permissions before fishing.
River conditions
Environment Agency evidence
Fish found in this river
Open a linked fish for detailed measurements, or use the map filter above to compare survey locations.
| Fish | Sites | Most recent | Fish counted | Measured length | Measured weight |
|---|---|---|---|---|---|
| Brown / sea troutSalmo trutta | 19 | 2025 | 17,596 | Median: 8.3 cm3,482 fish measuredLargest measured brown / sea trout: 36.2 cm | — |
| BullheadCottus gobio | 17 | 2025 | 1,532 | Median: 5 cm1,274 fish measuredLargest measured bullhead: 8.8 cm | — |
| European eelAnguilla anguilla | 16 | 2025 | 823 | Median: 20.5 cm736 fish measuredLargest measured european eel: 51.5 cm | Median: 5 oz (0.1405 kg)2 fish weighedLargest measured: 9.2 oz (0.26 kg) |
| Atlantic salmonSalmo salar | 14 | 2025 | 10,533 | Median: 6.4 cm978 fish measuredLargest measured atlantic salmon: 15.8 cm | — |
| Brook lampreyLampetra planeri | 7 | 2025 | 84 | Median: 10.3 cm84 fish measuredLargest measured brook lamprey: 13.5 cm | — |
| Stone loachBarbatula barbatula | 3 | 2001 | — | — | — |
| MinnowPhoxinus phoxinus | 1 | 2000 | — | — | — |
| FlounderPlatichthys flesus | 1 | 1999 | — | — | — |
| 3-spined sticklebackGasterosteus aculeatus | 1 | 2000 | — | — | — |
| Crucian carpCarassius carassius | 1 | 1991 | — | — | — |
| Golden goldfishCarassius auratus | 1 | 1998 | — | — | — |
| Rainbow troutOncorhynchus mykiss | 1 | 1994 | — | — | — |
| RoachRutilus rutilus | 1 | 1998 | — | — | — |
EA surveys have recorded these fish at particular sites and times. Absence from a survey is not evidence that a species is absent from the river. Every valid individual length and weight is retained, with its sample size shown.
Useful context
This page follows survey locations along the main River Main Allen. Tributaries and unrelated rivers with similar names are kept separate.
The map shows past fish records, not fishing access or a promise of what you’ll catch today.
How RiverFish handles the data →