River Blackwater
21 fish species have been recorded at 27 locations along the River Blackwater.
- Fish species
- 21
- Places surveyed
- 27
- Survey visits
- 77
- Records span
- 1985–2026
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 | 25 | 2026 | 3,703 | Median: 12.3 cm2,547 fish measuredLargest measured roach: 30.9 cm | Median: 1.4 oz (0.041 kg)9 fish weighedLargest measured: 5.7 oz (0.161 kg) |
| ChubLeuciscus cephalus | 24 | 2026 | 1,580 | Median: 28.9 cm1,032 fish measuredLargest measured chub: 51.2 cm | Median: 1 lb 3.6 oz (0.5565 kg)10 fish weighedLargest measured: 1 lb 14.6 oz (0.868 kg) |
| GudgeonGobio gobio | 23 | 2026 | 1,946 | Median: 11.9 cm1,409 fish measuredLargest measured gudgeon: 17.8 cm | Median: 0.7 oz (0.019 kg)15 fish weighedLargest measured: 0.9 oz (0.026 kg) |
| PikeEsox lucius | 21 | 2026 | 216 | Median: 40.7 cm148 fish measuredLargest measured pike: 86.2 cm | Median: 10.2 oz (0.2885 kg)10 fish weighedLargest measured: 3 lb 11 oz (1.67 kg) |
| DaceLeuciscus leuciscus | 21 | 2022 | 703 | Median: 17.6 cm128 fish measuredLargest measured dace: 25.2 cm | Recorded weight: 5.5 oz (0.155 kg)1 fish weighed |
| PerchPerca fluviatilis | 17 | 2026 | 3,006 | Median: 11.7 cm2,927 fish measuredLargest measured perch: 37.9 cm | Median: 1.5 oz (0.042 kg)27 fish weighedLargest measured: 4.8 oz (0.135 kg) |
| Stone loachBarbatula barbatula | 12 | 2025 | 3 | — | — |
| MinnowPhoxinus phoxinus | 9 | 2025 | — | — | — |
| TenchTinca tinca | 9 | 2026 | 110 | Median: 11 cm97 fish measuredLargest measured tench: 27.2 cm | Recorded weight: 8.4 oz (0.239 kg)1 fish weighed |
| 3-spined sticklebackGasterosteus aculeatus | 9 | 2026 | 135 | — | — |
| BullheadCottus gobio | 8 | 2026 | — | — | — |
| BarbelBarbus barbus | 7 | 2025 | 71 | Median: 43.5 cm18 fish measuredLargest measured barbel: 60.8 cm | — |
| European eelAnguilla anguilla | 5 | 2022 | 13 | Median: 76 cm11 fish measuredLargest measured european eel: 96.1 cm | — |
| Common breamAbramis brama | 4 | 2019 | 32 | Median: 9.9 cm5 fish measuredLargest measured common bream: 32.2 cm | — |
| Brown / sea troutSalmo trutta | 3 | 2025 | 57 | Median: 21.2 cm53 fish measuredLargest measured brown / sea trout: 44.2 cm | — |
| BleakAlburnus alburnus | 2 | 2016 | 8 | Median: 9.9 cm8 fish measuredLargest measured bleak: 11.6 cm | — |
| RuddScardinius erythrophthalmus | 2 | 2019 | 6 | Recorded length: 9.6 cm1 fish measured | — |
| Common carpCyprinus carpio | 2 | 2003 | 3 | Median: 42.1 cm3 fish measuredLargest measured common carp: 44 cm | — |
| 10-spined sticklebackPungitius pungitius | 1 | 2003 | — | — | — |
| Brook lampreyLampetra planeri | 1 | 2007 | — | — | — |
| RuffeGymnocephalus cernuus | 1 | 2006 | 1 | Recorded length: 10.6 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 →