River Witham
26 fish species have been recorded at 52 locations along the River Witham.
Records updated10 August 2026Most recent survey: 2025
- Fish species
- 26
- Places surveyed
- 52
- Survey visits
- 364
- Records span
- 1985–2025
Local EA evidence
Where fish were recorded
52 of 52 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 |
|---|---|---|---|---|---|
| DaceLeuciscus leuciscus | 43 | 2025 | 10,605 | Median: 12.5 cm10,605 fish measuredLargest measured dace: 44.5 cm | — |
| RoachRutilus rutilus | 42 | 2025 | 203,160 | Median: 10.4 cm112,333 fish measuredLargest measured roach: 49.1 cm | — |
| GudgeonGobio gobio | 41 | 2025 | 10,425 | Median: 9.1 cm9,861 fish measuredLargest measured gudgeon: 18.3 cm | — |
| European eelAnguilla anguilla | 40 | 2024 | 6,958 | Median: 43.5 cm779 fish measuredLargest measured european eel: 87.5 cm | Median: 4.4 oz (0.124 kg)17 fish weighedLargest measured: 15.7 oz (0.446 kg) |
| PerchPerca fluviatilis | 39 | 2025 | 29,982 | Median: 7.2 cm17,279 fish measuredLargest measured perch: 39.8 cm | — |
| PikeEsox lucius | 35 | 2025 | 2,024 | Median: 31.7 cm2,024 fish measuredLargest measured pike: 93.7 cm | — |
| Stone loachBarbatula barbatula | 32 | 2025 | 2,337 | Median: 7.5 cm2,337 fish measuredLargest measured stone loach: 13 cm | — |
| Brown / sea troutSalmo trutta | 29 | 2025 | 3,761 | Median: 24.2 cm3,760 fish measuredLargest measured brown / sea trout: 55 cm | — |
| Common breamAbramis brama | 27 | 2017 | 28,870 | Median: 17.8 cm7,462 fish measuredLargest measured common bream: 58.4 cm | — |
| RuffeGymnocephalus cernuus | 27 | 2017 | 5,247 | Median: 8.3 cm3,277 fish measuredLargest measured ruffe: 40.7 cm | — |
| TenchTinca tinca | 27 | 2024 | 259 | Median: 32.1 cm259 fish measuredLargest measured tench: 53.9 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 27 | 2025 | 771 | Median: 4.1 cm571 fish measuredLargest measured 3-spined stickleback: 8.5 cm | — |
| ChubLeuciscus cephalus | 26 | 2025 | 4,536 | Median: 23.2 cm4,451 fish measuredLargest measured chub: 65 cm | — |
| BullheadCottus gobio | 23 | 2025 | 3,565 | Median: 6.9 cm3,565 fish measuredLargest measured bullhead: 14.1 cm | — |
| Silver breamAbramis bjoerkna | 22 | 2010 | 10,261 | Median: 10.1 cm6,492 fish measuredLargest measured silver bream: 29.9 cm | — |
| Spined loachCobitis taenia | 18 | 2017 | 150 | Median: 8 cm150 fish measuredLargest measured spined loach: 12.6 cm | — |
| MinnowPhoxinus phoxinus | 17 | 2025 | 2,953 | Median: 6.2 cm1,953 fish measuredLargest measured minnow: 10.1 cm | — |
| BleakAlburnus alburnus | 17 | 2023 | 3,207 | Median: 10.3 cm1,957 fish measuredLargest measured bleak: 18.3 cm | — |
| RuddScardinius erythrophthalmus | 17 | 2025 | 226 | Median: 8.7 cm226 fish measuredLargest measured rudd: 26.5 cm | — |
| GraylingThymallus thymallus | 10 | 2025 | 714 | Median: 18 cm714 fish measuredLargest measured grayling: 38.1 cm | — |
| FlounderPlatichthys flesus | 7 | 2005 | 18 | Median: 16 cm18 fish measuredLargest measured flounder: 27.3 cm | — |
| Common carpCyprinus carpio | 6 | 2009 | 11 | Median: 35.2 cm11 fish measuredLargest measured common carp: 50.8 cm | Recorded weight: 6 lb 14.8 oz (3.14 kg)1 fish weighed |
| BarbelBarbus barbus | 4 | 2011 | 72 | Median: 18.1 cm72 fish measuredLargest measured barbel: 68.4 cm | Median: 6 lb 9 oz (2.98 kg)6 fish weighedLargest measured: 12 lb 5.5 oz (5.6 kg) |
| Brook lampreyLampetra planeri | 2 | 2014 | 10 | Median: 18.5 cm9 fish measuredLargest measured brook lamprey: 21.5 cm | — |
| Rainbow troutOncorhynchus mykiss | 2 | 1991 | 2 | Median: 33.2 cm2 fish measuredLargest measured rainbow trout: 38.6 cm | — |
| 10-spined sticklebackPungitius pungitius | 1 | 2008 | 1 | Recorded length: 9.8 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 Witham. 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 →