River Derwent
10 fish species have been recorded at 20 locations along the River Derwent.
- Fish species
- 10
- Places surveyed
- 20
- Survey visits
- 114
- Records span
- 2004–2025
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 | 19 | 2025 | 5,776 | Median: 8.5 cm4,575 fish measuredLargest measured brown / sea trout: 51.4 cm | — |
| MinnowPhoxinus phoxinus | 16 | 2025 | 2,758 | Median: 5.9 cm34 fish measuredLargest measured minnow: 8.2 cm | — |
| BullheadCottus gobio | 15 | 2025 | 2,791 | Median: 6.3 cm199 fish measuredLargest measured bullhead: 12.2 cm | — |
| Stone loachBarbatula barbatula | 14 | 2025 | 1,598 | Median: 7.9 cm99 fish measuredLargest measured stone loach: 11.2 cm | — |
| European eelAnguilla anguilla | 13 | 2025 | 176 | Median: 27 cm175 fish measuredLargest measured european eel: 61 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 12 | 2025 | 243 | — | — |
| Atlantic salmonSalmo salar | 11 | 2025 | 2,050 | Median: 7.4 cm1,170 fish measuredLargest measured atlantic salmon: 18.2 cm | — |
| GraylingThymallus thymallus | 8 | 2025 | 88 | Median: 9.5 cm88 fish measuredLargest measured grayling: 32.4 cm | — |
| River lampreyLampetra fluviatilis | 3 | 2013 | 15 | Median: 13 cm15 fish measuredLargest measured river lamprey: 18.5 cm | — |
| PerchPerca fluviatilis | 1 | 2025 | 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 Derwent. 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 →