River Itchen
19 fish species have been recorded at 46 locations along the River Itchen.
- Fish species
- 19
- Places surveyed
- 46
- Survey visits
- 286
- 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 |
|---|---|---|---|---|---|
| Brown / sea troutSalmo trutta | 42 | 2025 | 2,966 | Median: 11.4 cm2,966 fish measuredLargest measured brown / sea trout: 65 cm | Median: 0.8 oz (0.022 kg)320 fish weighedLargest measured: 2 lb 3.2 oz (0.999 kg) |
| BullheadCottus gobio | 37 | 2025 | 6,926 | Median: 6.1 cm737 fish measuredLargest measured bullhead: 16.9 cm | Median: 0.2 oz (0.0045 kg)2 fish weighedLargest measured: 0.2 oz (0.006 kg) |
| MinnowPhoxinus phoxinus | 36 | 2025 | 5,095 | Median: 6 cm340 fish measuredLargest measured minnow: 9.5 cm | — |
| European eelAnguilla anguilla | 35 | 2025 | 1,440 | Median: 28.5 cm1,326 fish measuredLargest measured european eel: 75 cm | Median: 2.1 oz (0.06 kg)185 fish weighedLargest measured: 2 lb 12.1 oz (1.25 kg) |
| Atlantic salmonSalmo salar | 32 | 2025 | 7,712 | Median: 8.7 cm7,712 fish measuredLargest measured atlantic salmon: 56 cm | Median: 0.4 oz (0.01 kg)2,118 fish weighedLargest measured: 2 lb 11 oz (1.22 kg) |
| GraylingThymallus thymallus | 25 | 2025 | 1,333 | Median: 19.9 cm1,333 fish measuredLargest measured grayling: 48.5 cm | Median: 2.3 oz (0.066 kg)711 fish weighedLargest measured: 1 lb 15.3 oz (0.887 kg) |
| Brook lampreyLampetra planeri | 23 | 2025 | 385 | Median: 8.6 cm311 fish measuredLargest measured brook lamprey: 15 cm | — |
| PikeEsox lucius | 23 | 2025 | 141 | Median: 39.5 cm141 fish measuredLargest measured pike: 83.2 cm | Median: 1 lb 7.2 oz (0.659 kg)43 fish weighedLargest measured: 12 lb 8.6 oz (5.69 kg) |
| Stone loachBarbatula barbatula | 22 | 2025 | 399 | Median: 8.6 cm23 fish measuredLargest measured stone loach: 12.2 cm | Median: 0.2 oz (0.006 kg)3 fish weighedLargest measured: 0.3 oz (0.009 kg) |
| 3-spined sticklebackGasterosteus aculeatus | 16 | 2025 | 94 | Median: 2.5 cm3 fish measuredLargest measured 3-spined stickleback: 2.9 cm | — |
| GudgeonGobio gobio | 7 | 2023 | 30 | Median: 11.7 cm30 fish measuredLargest measured gudgeon: 16.4 cm | Median: 1.5 oz (0.043 kg)7 fish weighedLargest measured: 2 oz (0.057 kg) |
| ChubLeuciscus cephalus | 7 | 2023 | 32 | Median: 36.2 cm32 fish measuredLargest measured chub: 61 cm | Median: 1 lb 7.8 oz (0.676 kg)17 fish weighedLargest measured: 4 lb 2.6 oz (1.89 kg) |
| RoachRutilus rutilus | 6 | 2019 | 15 | Median: 15.9 cm15 fish measuredLargest measured roach: 22 cm | Median: 4.1 oz (0.116 kg)11 fish weighedLargest measured: 8.1 oz (0.23 kg) |
| PerchPerca fluviatilis | 5 | 2019 | 10 | Median: 23.4 cm10 fish measuredLargest measured perch: 32.4 cm | Median: 1 lb 6 oz (0.624 kg)3 fish weighedLargest measured: 1 lb 7.4 oz (0.662 kg) |
| BarbelBarbus barbus | 2 | 2023 | 2 | Median: 13.6 cm2 fish measuredLargest measured barbel: 18.7 cm | — |
| TenchTinca tinca | 2 | 2010 | 2 | Median: 22.7 cm2 fish measuredLargest measured tench: 24.8 cm | — |
| DaceLeuciscus leuciscus | 1 | 2009 | 2 | Median: 14.6 cm2 fish measuredLargest measured dace: 15.1 cm | — |
| FlounderPlatichthys flesus | 1 | 2019 | 3 | Median: 5.3 cm3 fish measuredLargest measured flounder: 5.3 cm | — |
| Sea lampreyPetromyzon marinus | 1 | 2019 | 1 | Recorded length: 8.1 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 Itchen. 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 →