Itchen Navigation
16 fish species have been recorded at 5 locations along the Itchen Navigation.
- Fish species
- 16
- Places surveyed
- 5
- Survey visits
- 25
- Records span
- 2002–2025
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 |
|---|---|---|---|---|---|
| European eelAnguilla anguilla | 5 | 2025 | 715 | Median: 36.5 cm676 fish measuredLargest measured european eel: 74.3 cm | Median: 8.8 oz (0.25 kg)24 fish weighedLargest measured: 1 lb 3.2 oz (0.543 kg) |
| PikeEsox lucius | 4 | 2025 | 76 | Median: 41.3 cm76 fish measuredLargest measured pike: 96 cm | Median: 1 lb 2.9 oz (0.537 kg)61 fish weighedLargest measured: 18 lb 5.5 oz (8.32 kg) |
| MinnowPhoxinus phoxinus | 4 | 2025 | 1,879 | Median: 6.2 cm5 fish measuredLargest measured minnow: 9 cm | Median: 0.1 oz (0.004 kg)5 fish weighedLargest measured: 0.3 oz (0.009 kg) |
| RoachRutilus rutilus | 4 | 2025 | 147 | Median: 20.4 cm147 fish measuredLargest measured roach: 33.5 cm | Median: 3.4 oz (0.095 kg)83 fish weighedLargest measured: 1 lb 10.1 oz (0.74 kg) |
| GraylingThymallus thymallus | 3 | 2025 | 221 | Median: 20.6 cm221 fish measuredLargest measured grayling: 39.3 cm | Median: 3.1 oz (0.089 kg)75 fish weighedLargest measured: 1 lb 5.8 oz (0.617 kg) |
| Atlantic salmonSalmo salar | 3 | 2025 | 1,057 | Median: 9.9 cm1,057 fish measuredLargest measured atlantic salmon: 73.8 cm | Median: 0.4 oz (0.011 kg)106 fish weighedLargest measured: 10 lb 10 oz (4.82 kg) |
| Brown / sea troutSalmo trutta | 3 | 2025 | 380 | Median: 16.7 cm380 fish measuredLargest measured brown / sea trout: 64.3 cm | Median: 1.1 oz (0.03 kg)27 fish weighedLargest measured: 7 lb 10.4 oz (3.47 kg) |
| PerchPerca fluviatilis | 3 | 2025 | 42 | Median: 15.3 cm42 fish measuredLargest measured perch: 28.3 cm | Median: 1.7 oz (0.0495 kg)18 fish weighedLargest measured: 1 lb 1.2 oz (0.487 kg) |
| GudgeonGobio gobio | 2 | 2025 | 39 | Median: 12.9 cm39 fish measuredLargest measured gudgeon: 15 cm | Median: 0.8 oz (0.023 kg)13 fish weighedLargest measured: 1.3 oz (0.037 kg) |
| BullheadCottus gobio | 2 | 2025 | 645 | Median: 6 cm32 fish measuredLargest measured bullhead: 9 cm | — |
| Stone loachBarbatula barbatula | 2 | 2025 | 40 | — | — |
| Brook lampreyLampetra planeri | 2 | 2025 | 27 | Median: 11.7 cm6 fish measuredLargest measured brook lamprey: 12.5 cm | — |
| ChubLeuciscus cephalus | 2 | 2025 | 25 | Median: 19 cm25 fish measuredLargest measured chub: 36.1 cm | Median: 0.6 oz (0.0165 kg)6 fish weighedLargest measured: 0.7 oz (0.021 kg) |
| DaceLeuciscus leuciscus | 2 | 2023 | 4 | Median: 20.8 cm4 fish measuredLargest measured dace: 28.4 cm | Median: 12 oz (0.339 kg)3 fish weighedLargest measured: 12.1 oz (0.342 kg) |
| 3-spined sticklebackGasterosteus aculeatus | 1 | 2023 | 7 | — | — |
| Common carpCyprinus carpio | 1 | 2004 | 6 | Median: 51.2 cm6 fish measuredLargest measured common carp: 58.7 cm | Median: 8 lb 3.9 oz (3.74 kg)6 fish weighedLargest measured: 14 lb 15.8 oz (6.8 kg) |
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 Itchen Navigation. 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 →