By Brook main river
13 fish species have been recorded at 9 locations along the By Brook main river.
- Fish species
- 13
- Places surveyed
- 9
- Survey visits
- 18
- Records span
- 1999–2018
Local EA evidence
Where fish were recorded
Choose a point on the map to see what was recorded there.
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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 | 8 | 2018 | 863 | Median: 18 cm802 fish measuredLargest measured brown / sea trout: 38.6 cm | Median: 2.8 oz (0.08 kg)523 fish weighedLargest measured: 1 lb 1.7 oz (0.503 kg) |
| BullheadCottus gobio | 8 | 2018 | 616 | Median: 5.5 cm495 fish measuredLargest measured bullhead: 9.7 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 7 | 2018 | 218 | Median: 3.1 cm218 fish measuredLargest measured 3-spined stickleback: 5.9 cm | — |
| MinnowPhoxinus phoxinus | 7 | 2018 | 613 | Median: 5.2 cm568 fish measuredLargest measured minnow: 9.3 cm | — |
| Stone loachBarbatula barbatula | 7 | 2018 | 88 | Median: 5.8 cm88 fish measuredLargest measured stone loach: 13 cm | — |
| European eelAnguilla anguilla | 6 | 2018 | 24 | Median: 52.3 cm24 fish measuredLargest measured european eel: 70 cm | Median: 11.7 oz (0.333 kg)15 fish weighedLargest measured: 1 lb 7.8 oz (0.674 kg) |
| Brook lampreyLampetra planeri | 3 | 2002 | 2 | Median: 13 cm2 fish measuredLargest measured brook lamprey: 13 cm | Median: 0.1 oz (0.004 kg)2 fish weighedLargest measured: 0.1 oz (0.004 kg) |
| GudgeonGobio gobio | 3 | 2013 | 44 | Median: 14.1 cm44 fish measuredLargest measured gudgeon: 17.2 cm | Median: 1.4 oz (0.041 kg)27 fish weighedLargest measured: 2 oz (0.056 kg) |
| GraylingThymallus thymallus | 2 | 2018 | 18 | Median: 26.2 cm18 fish measuredLargest measured grayling: 31.2 cm | Recorded weight: 3.2 oz (0.09 kg)1 fish weighed |
| DaceLeuciscus leuciscus | 2 | 2013 | 94 | Median: 15.5 cm94 fish measuredLargest measured dace: 25.6 cm | Median: 7.1 oz (0.2015 kg)2 fish weighedLargest measured: 7.7 oz (0.218 kg) |
| RoachRutilus rutilus | 2 | 2013 | 6 | Median: 11.4 cm6 fish measuredLargest measured roach: 16.2 cm | Recorded weight: 0.3 oz (0.009 kg)1 fish weighed |
| ChubLeuciscus cephalus | 1 | 2013 | 1 | Recorded length: 20.7 cm1 fish measured | — |
| PerchPerca fluviatilis | 1 | 2013 | 1 | Recorded length: 7.5 cm1 fish measured | — |
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 By Brook main river. 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 →