River Thames
25 fish species have been recorded at 89 locations along the River Thames.
- Fish species
- 25
- Places surveyed
- 89
- Survey visits
- 740
- Records span
- 1993–2025
Local EA evidence
Where fish were recorded
Choose a point on the map to see what was recorded there.
Check local permissions before fishing.
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 |
|---|---|---|---|---|---|
| RoachRutilus rutilus | 83 | 2025 | 99,251 | Median: 11.8 cm99,162 fish measuredLargest measured roach: 43.5 cm | — |
| BleakAlburnus alburnus | 79 | 2025 | 59,515 | Median: 8.5 cm59,485 fish measuredLargest measured bleak: 19.6 cm | — |
| PikeEsox lucius | 77 | 2025 | 5,116 | Median: 46.1 cm5,116 fish measuredLargest measured pike: 115 cm | Recorded weight: 15.2 oz (0.431 kg)1 fish weighed |
| ChubLeuciscus cephalus | 77 | 2025 | 12,803 | Median: 15.6 cm12,797 fish measuredLargest measured chub: 57.5 cm | — |
| PerchPerca fluviatilis | 77 | 2025 | 8,604 | Median: 14.1 cm8,592 fish measuredLargest measured perch: 53 cm | Recorded weight: 6.2 oz (0.175 kg)1 fish weighed |
| DaceLeuciscus leuciscus | 73 | 2025 | 10,517 | Median: 10.2 cm10,434 fish measuredLargest measured dace: 25.6 cm | — |
| GudgeonGobio gobio | 61 | 2025 | 4,342 | Median: 9.5 cm4,242 fish measuredLargest measured gudgeon: 16.7 cm | — |
| Common breamAbramis brama | 60 | 2025 | 2,131 | Median: 24.6 cm2,131 fish measuredLargest measured common bream: 60.1 cm | — |
| European eelAnguilla anguilla | 47 | 2025 | 562 | Median: 76 cm558 fish measuredLargest measured european eel: 101 cm | Median: 3 lb 10.9 oz (1.67 kg)2 fish weighedLargest measured: 4 lb 7.3 oz (2.02 kg) |
| TenchTinca tinca | 46 | 2025 | 632 | Median: 38.3 cm632 fish measuredLargest measured tench: 59.9 cm | — |
| BarbelBarbus barbus | 46 | 2025 | 590 | Median: 53.7 cm575 fish measuredLargest measured barbel: 80.5 cm | Median: 6 lb 13.8 oz (3.11 kg)2 fish weighedLargest measured: 12 lb 1.6 oz (5.49 kg) |
| Silver breamAbramis bjoerkna | 45 | 2025 | 504 | Median: 12.1 cm504 fish measuredLargest measured silver bream: 38 cm | — |
| MinnowPhoxinus phoxinus | 26 | 2025 | — | — | — |
| RuffeGymnocephalus cernuus | 24 | 2025 | 130 | Median: 10.1 cm130 fish measuredLargest measured ruffe: 14.3 cm | — |
| Common carpCyprinus carpio | 22 | 2025 | 92 | Median: 62.5 cm91 fish measuredLargest measured common carp: 78.8 cm | Median: 19 lb 4 oz (8.73 kg)5 fish weighedLargest measured: 24 lb 0.8 oz (10.91 kg) |
| BullheadCottus gobio | 19 | 2025 | — | — | — |
| Brown / sea troutSalmo trutta | 19 | 2025 | 83 | Median: 32 cm83 fish measuredLargest measured brown / sea trout: 53.8 cm | — |
| Stone loachBarbatula barbatula | 17 | 2025 | — | — | — |
| RuddScardinius erythrophthalmus | 15 | 2025 | 37 | Median: 11 cm37 fish measuredLargest measured rudd: 19 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 9 | 2016 | — | — | — |
| Brook lampreyLampetra planeri | 6 | 2014 | — | — | — |
| ZanderSander lucioperca | 6 | 2025 | 8 | Median: 17.1 cm7 fish measuredLargest measured zander: 47.8 cm | — |
| Blue orfeLeuciscus idus | 1 | 2004 | 1 | Recorded length: 45 cm1 fish measured | — |
| GraylingThymallus thymallus | 1 | 2010 | 1 | Recorded length: 26.8 cm1 fish measured | — |
| Rainbow troutOncorhynchus mykiss | 1 | 2016 | 1 | Recorded length: 44.8 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 Thames. 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 →