River Mimram
19 fish species have been recorded at 29 locations along the River Mimram.
- Fish species
- 19
- Places surveyed
- 29
- Survey visits
- 105
- Records span
- 2003–2026
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 |
|---|---|---|---|---|---|
| BullheadCottus gobio | 27 | 2026 | 11,826 | Median: 6.1 cm1,439 fish measuredLargest measured bullhead: 11 cm | Median: 0.2 oz (0.005 kg)103 fish weighedLargest measured: 0.5 oz (0.014 kg) |
| Brown / sea troutSalmo trutta | 27 | 2026 | 2,308 | Median: 16.5 cm2,308 fish measuredLargest measured brown / sea trout: 56.1 cm | Median: 5.6 oz (0.16 kg)31 fish weighedLargest measured: 1 lb 9.4 oz (0.72 kg) |
| Stone loachBarbatula barbatula | 25 | 2026 | 8,602 | Median: 9.1 cm51 fish measuredLargest measured stone loach: 13.5 cm | Median: 0.4 oz (0.01 kg)6 fish weighedLargest measured: 0.6 oz (0.017 kg) |
| 3-spined sticklebackGasterosteus aculeatus | 21 | 2025 | 5,574 | Median: 4.2 cm73 fish measuredLargest measured 3-spined stickleback: 6 cm | — |
| MinnowPhoxinus phoxinus | 15 | 2026 | 4,518 | Median: 5.8 cm18 fish measuredLargest measured minnow: 7.4 cm | — |
| 10-spined sticklebackPungitius pungitius | 10 | 2019 | 517 | Median: 4.3 cm17 fish measuredLargest measured 10-spined stickleback: 6.5 cm | — |
| GraylingThymallus thymallus | 9 | 2025 | 1,069 | Median: 12.8 cm1,069 fish measuredLargest measured grayling: 40.4 cm | — |
| PikeEsox lucius | 5 | 2026 | 82 | Median: 26.5 cm69 fish measuredLargest measured pike: 68.8 cm | — |
| Brook lampreyLampetra planeri | 4 | 2025 | 61 | Median: 14.8 cm61 fish measuredLargest measured brook lamprey: 17.9 cm | — |
| DaceLeuciscus leuciscus | 3 | 2025 | 198 | Median: 18.7 cm148 fish measuredLargest measured dace: 25.6 cm | — |
| RuddScardinius erythrophthalmus | 2 | 2018 | 28 | Median: 9.9 cm28 fish measuredLargest measured rudd: 21.8 cm | — |
| RoachRutilus rutilus | 2 | 2014 | 22 | Median: 7 cm2 fish measuredLargest measured roach: 9 cm | — |
| European eelAnguilla anguilla | 1 | 2007 | 2 | Median: 84.3 cm2 fish measuredLargest measured european eel: 88 cm | — |
| BleakAlburnus alburnus | 1 | 2010 | 1 | Recorded length: 15.3 cm1 fish measured | — |
| ChubLeuciscus cephalus | 1 | 2006 | 50 | — | — |
| Common carpCyprinus carpio | 1 | 2009 | 1 | Recorded length: 39 cm1 fish measured | — |
| Golden goldfishCarassius auratus | 1 | 2006 | 1 | Recorded length: 6.4 cm1 fish measured | — |
| GudgeonGobio gobio | 1 | 2003 | 3 | Median: 13.2 cm3 fish measuredLargest measured gudgeon: 13.4 cm | — |
| PerchPerca fluviatilis | 1 | 2003 | 1 | Recorded length: 34 cm1 fish measured | — |
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 Mimram. 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 →