River Mersey
17 fish species have been recorded at 8 locations along the River Mersey.
- Fish species
- 17
- Places surveyed
- 8
- Survey visits
- 31
- Records span
- 2000–2010
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 |
|---|---|---|---|---|---|
| GudgeonGobio gobio | 8 | 2010 | 311 | Median: 11.9 cm311 fish measuredLargest measured gudgeon: 17 cm | — |
| RoachRutilus rutilus | 7 | 2010 | 747 | Median: 17 cm747 fish measuredLargest measured roach: 31 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 6 | 2006 | 1,722 | Median: 3.5 cm6 fish measuredLargest measured 3-spined stickleback: 4 cm | — |
| ChubLeuciscus cephalus | 6 | 2010 | 85 | Median: 12.8 cm85 fish measuredLargest measured chub: 40.5 cm | — |
| MinnowPhoxinus phoxinus | 5 | 2006 | 796 | Median: 7.1 cm55 fish measuredLargest measured minnow: 9.5 cm | — |
| PerchPerca fluviatilis | 4 | 2010 | 394 | Median: 15.1 cm394 fish measuredLargest measured perch: 27 cm | — |
| DaceLeuciscus leuciscus | 3 | 2010 | 205 | Median: 13.3 cm205 fish measuredLargest measured dace: 25.3 cm | — |
| Stone loachBarbatula barbatula | 3 | 2006 | 110 | Median: 3.7 cm27 fish measuredLargest measured stone loach: 8.7 cm | — |
| BullheadCottus gobio | 3 | 2006 | 42 | Median: 10.2 cm2 fish measuredLargest measured bullhead: 10.9 cm | — |
| Common breamAbramis brama | 2 | 2010 | 67 | Median: 25.5 cm67 fish measuredLargest measured common bream: 35 cm | — |
| European eelAnguilla anguilla | 2 | 2009 | 7 | Median: 25 cm5 fish measuredLargest measured european eel: 35.5 cm | — |
| Brown / sea troutSalmo trutta | 2 | 2006 | 2 | Median: 16 cm2 fish measuredLargest measured brown / sea trout: 24.4 cm | — |
| PikeEsox lucius | 1 | 2000 | 555 | Median: 17.5 cm5 fish measuredLargest measured pike: 19.6 cm | — |
| TenchTinca tinca | 1 | 2000 | 4 | Median: 22.8 cm4 fish measuredLargest measured tench: 31 cm | — |
| BarbelBarbus barbus | 1 | 2006 | 1 | Recorded length: 6.7 cm1 fish measured | — |
| FlounderPlatichthys flesus | 1 | 2003 | 2 | Median: 16.5 cm2 fish measuredLargest measured flounder: 19.6 cm | — |
| RuddScardinius erythrophthalmus | 1 | 2007 | 3 | Median: 16.7 cm3 fish measuredLargest measured rudd: 17 cm | — |
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 Mersey. 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 →