River Marron
8 fish species have been recorded at 9 locations along the River Marron.
- Fish species
- 8
- Places surveyed
- 9
- Survey visits
- 69
- 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 |
|---|---|---|---|---|---|
| Brown / sea troutSalmo trutta | 9 | 2025 | 5,957 | Median: 7.3 cm1,068 fish measuredLargest measured brown / sea trout: 21.3 cm | — |
| Atlantic salmonSalmo salar | 8 | 2025 | 11,025 | Median: 7.2 cm568 fish measuredLargest measured atlantic salmon: 14.6 cm | — |
| European eelAnguilla anguilla | 8 | 2025 | 381 | Median: 15.5 cm381 fish measuredLargest measured european eel: 45 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 5 | 2023 | — | — | — |
| MinnowPhoxinus phoxinus | 5 | 2024 | — | — | — |
| Stone loachBarbatula barbatula | 4 | 2025 | — | — | — |
| PerchPerca fluviatilis | 2 | 2016 | 10 | Median: 6 cm10 fish measuredLargest measured perch: 9.5 cm | — |
| Brook lampreyLampetra planeri | 1 | 2008 | — | — | — |
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 Marron. 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 →