River Brock
13 fish species have been recorded at 9 locations along the River Brock.
- Fish species
- 13
- Places surveyed
- 9
- Survey visits
- 35
- Records span
- 1999–2025
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 | 9 | 2025 | 1,280 | Median: 10.5 cm975 fish measuredLargest measured brown / sea trout: 45 cm | — |
| BullheadCottus gobio | 7 | 2025 | — | — | — |
| European eelAnguilla anguilla | 7 | 2025 | 1,287 | Median: 15 cm1,094 fish measuredLargest measured european eel: 60 cm | — |
| Stone loachBarbatula barbatula | 6 | 2025 | — | — | — |
| Atlantic salmonSalmo salar | 2 | 2023 | 167 | Median: 6.8 cm109 fish measuredLargest measured atlantic salmon: 15.6 cm | — |
| DaceLeuciscus leuciscus | 2 | 2025 | 236 | Median: 17.1 cm234 fish measuredLargest measured dace: 26.8 cm | Median: 1.8 oz (0.05 kg)3 fish weighedLargest measured: 1.8 oz (0.05 kg) |
| MinnowPhoxinus phoxinus | 2 | 2025 | — | — | — |
| Brook lampreyLampetra planeri | 2 | 2023 | 111 | Median: 11 cm111 fish measuredLargest measured brook lamprey: 17 cm | — |
| ChubLeuciscus cephalus | 2 | 2023 | 124 | Median: 18.5 cm124 fish measuredLargest measured chub: 48 cm | — |
| FlounderPlatichthys flesus | 2 | 2017 | 31 | Median: 12.1 cm21 fish measuredLargest measured flounder: 23.5 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 2 | 2021 | — | — | — |
| River lampreyLampetra fluviatilis | 1 | 2016 | 3 | Median: 14 cm3 fish measuredLargest measured river lamprey: 28 cm | — |
| PikeEsox lucius | 1 | 1999 | 1 | — | — |
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 Brock. 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 →