Main River Isle
19 fish species have been recorded at 15 locations along the Main River Isle.
Records updated10 August 2026Most recent survey: 2022
- Fish species
- 19
- Places surveyed
- 15
- Survey visits
- 69
- Records span
- 1992–2022
Local EA evidence
Where fish were recorded
15 of 15 places shown
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 |
|---|---|---|---|---|---|
| European eelAnguilla anguilla | 15 | 2022 | 1,553 | Median: 31 cm1,525 fish measuredLargest measured european eel: 62 cm | Median: 2 oz (0.056 kg)1,257 fish weighedLargest measured: 13.7 oz (0.389 kg) |
| Stone loachBarbatula barbatula | 13 | 2022 | 526 | Median: 7.4 cm361 fish measuredLargest measured stone loach: 11.1 cm | Median: 0.2 oz (0.005 kg)60 fish weighedLargest measured: 3.5 oz (0.1 kg) |
| MinnowPhoxinus phoxinus | 12 | 2022 | 2,154 | Median: 5.4 cm830 fish measuredLargest measured minnow: 8.7 cm | Median: 0.1 oz (0.004 kg)116 fish weighedLargest measured: 0.3 oz (0.009 kg) |
| ChubLeuciscus cephalus | 11 | 2022 | 983 | Median: 19.2 cm983 fish measuredLargest measured chub: 50.5 cm | Median: 5.3 oz (0.15 kg)507 fish weighedLargest measured: 3 lb 8.1 oz (1.59 kg) |
| DaceLeuciscus leuciscus | 11 | 2022 | 833 | Median: 14.5 cm833 fish measuredLargest measured dace: 24.9 cm | Median: 1.1 oz (0.031 kg)353 fish weighedLargest measured: 7.5 oz (0.213 kg) |
| RoachRutilus rutilus | 11 | 2022 | 1,534 | Median: 9.1 cm1,534 fish measuredLargest measured roach: 36.4 cm | Median: 0.7 oz (0.019 kg)667 fish weighedLargest measured: 1 lb 11.1 oz (0.768 kg) |
| BullheadCottus gobio | 11 | 2022 | 769 | Median: 5.6 cm478 fish measuredLargest measured bullhead: 10.4 cm | Median: 0.2 oz (0.007 kg)115 fish weighedLargest measured: 0.5 oz (0.015 kg) |
| GudgeonGobio gobio | 10 | 2022 | 838 | Median: 10 cm838 fish measuredLargest measured gudgeon: 19.7 cm | Median: 0.5 oz (0.015 kg)340 fish weighedLargest measured: 2.5 oz (0.07 kg) |
| Brown / sea troutSalmo trutta | 10 | 2022 | 363 | Median: 20.4 cm363 fish measuredLargest measured brown / sea trout: 44.3 cm | Median: 3.4 oz (0.097 kg)170 fish weighedLargest measured: 2 lb 0.3 oz (0.917 kg) |
| 3-spined sticklebackGasterosteus aculeatus | 10 | 2022 | 41 | Median: 4.7 cm35 fish measuredLargest measured 3-spined stickleback: 6.3 cm | Median: 0.1 oz (0.002 kg)12 fish weighedLargest measured: 0.2 oz (0.006 kg) |
| PerchPerca fluviatilis | 9 | 2022 | 29 | Median: 12.8 cm29 fish measuredLargest measured perch: 24.1 cm | Median: 2 oz (0.0565 kg)8 fish weighedLargest measured: 9.6 oz (0.272 kg) |
| PikeEsox lucius | 8 | 2022 | 89 | Median: 49.9 cm89 fish measuredLargest measured pike: 86.7 cm | Median: 1 lb 8.8 oz (0.702 kg)55 fish weighedLargest measured: 15 lb 6.9 oz (7 kg) |
| Common breamAbramis brama | 5 | 2022 | 13 | Median: 7.9 cm13 fish measuredLargest measured common bream: 46.7 cm | Median: 0.8 oz (0.023 kg)7 fish weighedLargest measured: 4 lb 6.5 oz (2 kg) |
| RuddScardinius erythrophthalmus | 3 | 2022 | 10 | Median: 8.9 cm10 fish measuredLargest measured rudd: 22.5 cm | Median: 0.5 oz (0.014 kg)6 fish weighedLargest measured: 8.7 oz (0.246 kg) |
| Rainbow troutOncorhynchus mykiss | 2 | 1997 | 2 | Median: 28.7 cm2 fish measuredLargest measured rainbow trout: 34.3 cm | Recorded weight: 6.3 oz (0.179 kg)1 fish weighed |
| Motherless minnow / SunbleakLeucaspius delineatus | 1 | 2022 | 21 | Median: 5.3 cm21 fish measuredLargest measured motherless minnow / sunbleak: 6.6 cm | — |
| RuffeGymnocephalus cernuus | 1 | 1997 | 6 | Median: 6.5 cm6 fish measuredLargest measured ruffe: 10 cm | Median: 0.1 oz (0.004 kg)6 fish weighedLargest measured: 0.6 oz (0.017 kg) |
| Silver breamAbramis bjoerkna | 1 | 2022 | 3 | Median: 8.7 cm3 fish measuredLargest measured silver bream: 9.9 cm | — |
| TenchTinca tinca | 1 | 2003 | 1 | Recorded length: 15.5 cm1 fish measured | Recorded weight: 2.4 oz (0.067 kg)1 fish weighed |
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 Main River Isle. 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 →