River Ouse
28 fish species have been recorded at 24 locations along the River Ouse.
- Fish species
- 28
- Places surveyed
- 24
- Survey visits
- 294
- Records span
- 1984–2026
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 | 23 | 2026 | 40,368 | Median: 6.7 cm19,217 fish measuredLargest measured roach: 99.9 cm | — |
| PerchPerca fluviatilis | 23 | 2026 | 2,075 | Median: 13.8 cm1,960 fish measuredLargest measured perch: 125.8 cm | — |
| GudgeonGobio gobio | 21 | 2026 | 7,739 | Median: 6.4 cm4,322 fish measuredLargest measured gudgeon: 18.8 cm | — |
| RuffeGymnocephalus cernuus | 20 | 2024 | 584 | Median: 7.7 cm352 fish measuredLargest measured ruffe: 18.5 cm | — |
| BleakAlburnus alburnus | 19 | 2026 | 10,441 | Median: 7.9 cm6,458 fish measuredLargest measured bleak: 103.6 cm | — |
| PikeEsox lucius | 19 | 2026 | 1,066 | Median: 58 cm1,057 fish measuredLargest measured pike: 109.8 cm | — |
| Common breamAbramis brama | 19 | 2022 | 2,681 | Median: 6.3 cm235 fish measuredLargest measured common bream: 44.2 cm | — |
| Silver breamAbramis bjoerkna | 19 | 2024 | 129 | Median: 9.6 cm126 fish measuredLargest measured silver bream: 99.9 cm | — |
| ChubLeuciscus cephalus | 17 | 2025 | 11,756 | Median: 2.9 cm4,539 fish measuredLargest measured chub: 55.5 cm | — |
| DaceLeuciscus leuciscus | 17 | 2026 | 3,999 | Median: 5.6 cm2,758 fish measuredLargest measured dace: 20.8 cm | — |
| European eelAnguilla anguilla | 17 | 2024 | 31 | Median: 35 cm29 fish measuredLargest measured european eel: 50.5 cm | — |
| MinnowPhoxinus phoxinus | 16 | 2025 | 2,502 | Median: 2.9 cm813 fish measuredLargest measured minnow: 9 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 9 | 2025 | 89 | Median: 3.6 cm62 fish measuredLargest measured 3-spined stickleback: 12.8 cm | — |
| BarbelBarbus barbus | 7 | 2025 | 89 | Median: 19.5 cm69 fish measuredLargest measured barbel: 66 cm | Median: 3 lb 2.5 oz (1.43 kg)2 fish weighedLargest measured: 3 lb 9 oz (1.62 kg) |
| BullheadCottus gobio | 7 | 2019 | 6 | Median: 5.1 cm6 fish measuredLargest measured bullhead: 6.6 cm | — |
| FlounderPlatichthys flesus | 6 | 2025 | 221 | Median: 15.7 cm221 fish measuredLargest measured flounder: 37.2 cm | — |
| RuddScardinius erythrophthalmus | 5 | 2016 | 17 | Median: 8.8 cm17 fish measuredLargest measured rudd: 17.6 cm | — |
| Stone loachBarbatula barbatula | 5 | 2016 | 6 | Median: 6.7 cm5 fish measuredLargest measured stone loach: 49.2 cm | — |
| Atlantic salmonSalmo salar | 4 | 2026 | 109 | Median: 75.4 cm67 fish measuredLargest measured atlantic salmon: 90 cm | — |
| Brown / sea troutSalmo trutta | 4 | 2019 | 40 | Median: 49.5 cm39 fish measuredLargest measured brown / sea trout: 70.2 cm | — |
| TenchTinca tinca | 4 | 2006 | 7 | Median: 40.5 cm7 fish measuredLargest measured tench: 50.4 cm | — |
| GraylingThymallus thymallus | 2 | 2014 | 6 | Median: 11.2 cm6 fish measuredLargest measured grayling: 16.3 cm | — |
| Sea lampreyPetromyzon marinus | 1 | 2014 | 1 | Recorded length: 73 cm1 fish measuredView sea lamprey measurement → | — |
| 10-spined sticklebackPungitius pungitius | 1 | 1999 | 1 | Recorded length: 3.9 cm1 fish measured | — |
| Allis shadAlosa alosa | 1 | 2000 | 1 | Recorded length: 43.4 cm1 fish measured | — |
| Common carpCyprinus carpio | 1 | 2010 | 1 | Recorded length: 32.8 cm1 fish measured | — |
| Twaite shadAlosa fallax | 1 | 2008 | 1 | Recorded length: 4.3 cm1 fish measured | — |
| ZanderSander lucioperca | 1 | 2024 | 1 | Recorded length: 50 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 Ouse. 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 →