River Ruthern
9 fish species have been recorded at 8 locations along the River Ruthern.
- Fish species
- 9
- Places surveyed
- 8
- Survey visits
- 67
- Records span
- 1980–2026
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 | 8 | 2026 | 3,893 | Median: 12.2 cm1,250 fish measuredLargest measured brown / sea trout: 35.8 cm | — |
| BullheadCottus gobio | 8 | 2026 | 754 | Median: 5.5 cm576 fish measuredLargest measured bullhead: 9.2 cm | — |
| European eelAnguilla anguilla | 7 | 2026 | 392 | Median: 18 cm340 fish measuredLargest measured european eel: 56.1 cm | — |
| Atlantic salmonSalmo salar | 6 | 2026 | 3,167 | Median: 6 cm541 fish measuredLargest measured atlantic salmon: 15 cm | — |
| Brook lampreyLampetra planeri | 3 | 2026 | 34 | Median: 10.7 cm34 fish measuredLargest measured brook lamprey: 18 cm | — |
| MinnowPhoxinus phoxinus | 1 | 1997 | — | — | — |
| FlounderPlatichthys flesus | 1 | 2000 | — | — | — |
| PerchPerca fluviatilis | 1 | 1994 | — | — | — |
| Crucian carpCarassius carassius | 1 | 1997 | — | — | — |
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 Ruthern. 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 →