River Wensum (upper)
15 fish species have been recorded at 10 locations along the River Wensum (upper).
- Fish species
- 15
- Places surveyed
- 10
- Survey visits
- 103
- Records span
- 1986–2025
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 |
|---|---|---|---|---|---|
| Brown / sea troutSalmo trutta | 10 | 2025 | 5,956 | Median: 17 cm5,820 fish measuredLargest measured brown / sea trout: 53.3 cm | Median: 2.3 oz (0.066 kg)153 fish weighedLargest measured: 8.8 oz (0.25 kg) |
| Stone loachBarbatula barbatula | 10 | 2025 | 2,163 | Median: 8.8 cm2,084 fish measuredLargest measured stone loach: 14.4 cm | Median: 0.4 oz (0.012 kg)18 fish weighedLargest measured: 0.9 oz (0.026 kg) |
| BullheadCottus gobio | 10 | 2025 | 2,169 | Median: 6.3 cm2,092 fish measuredLargest measured bullhead: 11.2 cm | Median: 0.1 oz (0.003 kg)75 fish weighedLargest measured: 2 oz (0.056 kg) |
| European eelAnguilla anguilla | 10 | 2024 | 363 | Median: 48 cm47 fish measuredLargest measured european eel: 82.2 cm | Median: 8.4 oz (0.237 kg)15 fish weighedLargest measured: 1 lb 15.7 oz (0.9 kg) |
| 3-spined sticklebackGasterosteus aculeatus | 9 | 2025 | 501 | Median: 4.1 cm501 fish measuredLargest measured 3-spined stickleback: 7.8 cm | Median: 0.1 oz (0.0015 kg)2 fish weighedLargest measured: 0.1 oz (0.002 kg) |
| Brook lampreyLampetra planeri | 9 | 2025 | 417 | Median: 13.3 cm161 fish measuredLargest measured brook lamprey: 18 cm | Median: 0.2 oz (0.005 kg)65 fish weighedLargest measured: 0.4 oz (0.01 kg) |
| 10-spined sticklebackPungitius pungitius | 8 | 2025 | 120 | Median: 4.2 cm120 fish measuredLargest measured 10-spined stickleback: 5.4 cm | Recorded weight: 0 oz (0.001 kg)1 fish weighed |
| DaceLeuciscus leuciscus | 7 | 2025 | 1,338 | Median: 18.3 cm1,338 fish measuredLargest measured dace: 27.8 cm | Median: 4.5 oz (0.128 kg)3 fish weighedLargest measured: 4.7 oz (0.133 kg) |
| GudgeonGobio gobio | 7 | 2025 | 263 | Median: 12.3 cm263 fish measuredLargest measured gudgeon: 17.8 cm | Recorded weight: 1.7 oz (0.048 kg)1 fish weighed |
| MinnowPhoxinus phoxinus | 7 | 2025 | 1,269 | Median: 5.5 cm1,024 fish measuredLargest measured minnow: 9.4 cm | — |
| PerchPerca fluviatilis | 4 | 1994 | 17 | Median: 18.3 cm17 fish measuredLargest measured perch: 24.2 cm | — |
| RoachRutilus rutilus | 3 | 2025 | 717 | Median: 15.4 cm715 fish measuredLargest measured roach: 26.3 cm | — |
| RuddScardinius erythrophthalmus | 2 | 2025 | 13 | Median: 12.8 cm13 fish measuredLargest measured rudd: 16.8 cm | — |
| PikeEsox lucius | 1 | 2018 | 24 | Median: 54.2 cm24 fish measuredLargest measured pike: 76.8 cm | — |
| Rainbow troutOncorhynchus mykiss | 1 | 2018 | 2 | Median: 29.6 cm2 fish measuredLargest measured rainbow trout: 30.9 cm | — |
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 Wensum (upper). 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 →