Gilwern / Back Brook
2 fish species have been recorded at 2 locations along the Gilwern / Back Brook.
- Fish species
- 2
- Places surveyed
- 2
- Survey visits
- 3
- Records span
- 2003–2010
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 | 2 | 2010 | 36 | Median: 12.5 cm36 fish measuredLargest measured brown / sea trout: 22.5 cm | — |
| BullheadCottus gobio | 2 | 2010 | 60 | — | — |
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 Gilwern / Back Brook. 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 →