River Blackwater
17 fish species have been recorded at 7 locations along the River Blackwater.
- Fish species
- 17
- Places surveyed
- 7
- Survey visits
- 36
- Records span
- 2001–2025
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 |
|---|---|---|---|---|---|
| RoachRutilus rutilus | 7 | 2025 | 283 | Median: 13.5 cm283 fish measuredLargest measured roach: 26.5 cm | Median: 1.8 oz (0.052 kg)89 fish weighedLargest measured: 12 oz (0.34 kg) |
| BullheadCottus gobio | 6 | 2025 | 526 | Median: 5.5 cm42 fish measuredLargest measured bullhead: 7 cm | Median: 0.1 oz (0.0025 kg)2 fish weighedLargest measured: 0.1 oz (0.003 kg) |
| European eelAnguilla anguilla | 6 | 2025 | 72 | Median: 35.5 cm59 fish measuredLargest measured european eel: 64 cm | Median: 4.3 oz (0.123 kg)3 fish weighedLargest measured: 9 oz (0.254 kg) |
| DaceLeuciscus leuciscus | 6 | 2025 | 77 | Median: 16 cm77 fish measuredLargest measured dace: 24 cm | Median: 1.7 oz (0.048 kg)9 fish weighedLargest measured: 3.5 oz (0.098 kg) |
| Brown / sea troutSalmo trutta | 5 | 2025 | 531 | Median: 13.3 cm531 fish measuredLargest measured brown / sea trout: 37.5 cm | Median: 1 oz (0.029 kg)313 fish weighedLargest measured: 9.3 oz (0.265 kg) |
| Stone loachBarbatula barbatula | 5 | 2025 | 183 | Median: 9.2 cm17 fish measuredLargest measured stone loach: 11.9 cm | Median: 0.2 oz (0.005 kg)17 fish weighedLargest measured: 1.4 oz (0.04 kg) |
| GudgeonGobio gobio | 5 | 2025 | 44 | Median: 12 cm44 fish measuredLargest measured gudgeon: 15.5 cm | Median: 0.4 oz (0.01 kg)5 fish weighedLargest measured: 0.6 oz (0.016 kg) |
| PikeEsox lucius | 5 | 2024 | 30 | Median: 39.7 cm30 fish measuredLargest measured pike: 59 cm | Median: 1 lb 13.1 oz (0.826 kg)11 fish weighedLargest measured: 3 lb 11.6 oz (1.69 kg) |
| PerchPerca fluviatilis | 4 | 2025 | 83 | Median: 15.4 cm83 fish measuredLargest measured perch: 28.6 cm | Median: 2 oz (0.058 kg)21 fish weighedLargest measured: 13.3 oz (0.377 kg) |
| GraylingThymallus thymallus | 4 | 2022 | 24 | Median: 21.2 cm24 fish measuredLargest measured grayling: 32 cm | Median: 3 oz (0.085 kg)10 fish weighedLargest measured: 10.7 oz (0.302 kg) |
| Brook lampreyLampetra planeri | 3 | 2025 | 41 | Median: 11.2 cm16 fish measuredLargest measured brook lamprey: 13.4 cm | Median: 0.1 oz (0.002 kg)5 fish weighedLargest measured: 0.1 oz (0.003 kg) |
| ChubLeuciscus cephalus | 2 | 2025 | 36 | Median: 20.9 cm36 fish measuredLargest measured chub: 41.4 cm | — |
| Common breamAbramis brama | 2 | 2022 | 26 | Median: 15.8 cm26 fish measuredLargest measured common bream: 22 cm | Median: 3.6 oz (0.102 kg)9 fish weighedLargest measured: 6.9 oz (0.195 kg) |
| 3-spined sticklebackGasterosteus aculeatus | 2 | 2024 | 3 | — | — |
| RuddScardinius erythrophthalmus | 2 | 2021 | 2 | Median: 15.3 cm2 fish measuredLargest measured rudd: 19 cm | — |
| MinnowPhoxinus phoxinus | 1 | 2025 | 34 | — | — |
| TenchTinca tinca | 1 | 2011 | 1 | Recorded length: 32.5 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 River Blackwater. 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 →