Grand Union Canal
15 fish species have been recorded at 20 locations along the Grand Union Canal.
- Fish species
- 15
- Places surveyed
- 20
- Survey visits
- 21
- Records span
- 1986–2013
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 |
|---|---|---|---|---|---|
| PerchPerca fluviatilis | 20 | 2013 | 430 | Median: 11.8 cm430 fish measuredLargest measured perch: 39.4 cm | Median: 1.3 oz (0.036 kg)345 fish weighedLargest measured: 1 lb 15.7 oz (0.9 kg) |
| RoachRutilus rutilus | 18 | 2013 | 3,961 | Median: 14.2 cm3,961 fish measuredLargest measured roach: 35.1 cm | Median: 1.3 oz (0.036 kg)1,500 fish weighedLargest measured: 1 lb 14.1 oz (0.854 kg) |
| PikeEsox lucius | 16 | 2013 | 84 | Median: 48.7 cm84 fish measuredLargest measured pike: 80.1 cm | Median: 2 lb 0.1 oz (0.909 kg)81 fish weighedLargest measured: 8 lb 9.9 oz (3.91 kg) |
| Common breamAbramis brama | 11 | 1988 | 580 | Median: 18.7 cm580 fish measuredLargest measured common bream: 43.6 cm | Median: 4.5 oz (0.1265 kg)356 fish weighedLargest measured: 2 lb 13.6 oz (1.29 kg) |
| GudgeonGobio gobio | 11 | 2013 | 142 | Median: 8.2 cm142 fish measuredLargest measured gudgeon: 13.8 cm | Median: 0.2 oz (0.005 kg)73 fish weighedLargest measured: 3.5 oz (0.1 kg) |
| European eelAnguilla anguilla | 9 | 2013 | 37 | Median: 50.3 cm37 fish measuredLargest measured european eel: 92 cm | Median: 7.9 oz (0.224 kg)36 fish weighedLargest measured: 3 lb 7.1 oz (1.56 kg) |
| TenchTinca tinca | 8 | 1988 | 70 | Median: 28.5 cm70 fish measuredLargest measured tench: 72.5 cm | Median: 15.2 oz (0.4305 kg)68 fish weighedLargest measured: 2 lb 13.7 oz (1.3 kg) |
| ChubLeuciscus cephalus | 5 | 2013 | 41 | Median: 29.6 cm41 fish measuredLargest measured chub: 46.5 cm | Median: 14.8 oz (0.42 kg)33 fish weighedLargest measured: 3 lb 7.8 oz (1.58 kg) |
| Common carpCyprinus carpio | 5 | 2013 | 22 | Median: 44.1 cm22 fish measuredLargest measured common carp: 58.5 cm | Median: 4 lb 13.8 oz (2.21 kg)21 fish weighedLargest measured: 10 lb 0.5 oz (4.55 kg) |
| DaceLeuciscus leuciscus | 5 | 1988 | 35 | Median: 9.7 cm35 fish measuredLargest measured dace: 22.5 cm | Median: 0.5 oz (0.0145 kg)26 fish weighedLargest measured: 5.4 oz (0.152 kg) |
| RuddScardinius erythrophthalmus | 4 | 1988 | 71 | Median: 13.4 cm71 fish measuredLargest measured rudd: 22.5 cm | Median: 1.5 oz (0.042 kg)66 fish weighedLargest measured: 8.7 oz (0.247 kg) |
| Crucian carpCarassius carassius | 3 | 1988 | 11 | Median: 20 cm11 fish measuredLargest measured crucian carp: 28.2 cm | Median: 8.1 oz (0.23 kg)11 fish weighedLargest measured: 1 lb 5.1 oz (0.597 kg) |
| MinnowPhoxinus phoxinus | 2 | 2013 | 27 | Median: 5.4 cm2 fish measuredLargest measured minnow: 5.6 cm | Recorded weight: 0.1 oz (0.002 kg)1 fish weighed |
| 3-spined sticklebackGasterosteus aculeatus | 1 | 2013 | 4 | — | — |
| RuffeGymnocephalus cernuus | 1 | 1988 | 1 | Recorded length: 11.5 cm1 fish measured | Recorded weight: 1 oz (0.027 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 Grand Union Canal. 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 →