Grand Union Canal
16 fish species have been recorded at 16 locations along the Grand Union Canal.
- Fish species
- 16
- Places surveyed
- 16
- Survey visits
- 31
- Records span
- 1990–1994
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 | 16 | 1994 | 6,750 | Median: 8.3 cm5,093 fish measuredLargest measured perch: 38.3 cm | — |
| Common breamAbramis brama | 16 | 1994 | 6,233 | Median: 8.3 cm3,648 fish measuredLargest measured common bream: 46.3 cm | — |
| GudgeonGobio gobio | 16 | 1994 | 4,522 | Median: 9.8 cm2,798 fish measuredLargest measured gudgeon: 15.8 cm | — |
| RoachRutilus rutilus | 16 | 1994 | 37,869 | Median: 9.3 cm16,882 fish measuredLargest measured roach: 29.8 cm | — |
| RuffeGymnocephalus cernuus | 16 | 1994 | 1,793 | Median: 9.8 cm1,633 fish measuredLargest measured ruffe: 15.3 cm | — |
| PikeEsox lucius | 10 | 1994 | 65 | Median: 43.3 cm65 fish measuredLargest measured pike: 72.3 cm | — |
| BullheadCottus gobio | 8 | 1994 | 14 | Median: 7.1 cm14 fish measuredLargest measured bullhead: 9.3 cm | — |
| RuddScardinius erythrophthalmus | 6 | 1994 | 49 | Median: 8.3 cm49 fish measuredLargest measured rudd: 15.8 cm | — |
| Silver breamAbramis bjoerkna | 5 | 1993 | 12 | Median: 17.1 cm12 fish measuredLargest measured silver bream: 26.3 cm | — |
| TenchTinca tinca | 5 | 1990 | 11 | Median: 25.3 cm11 fish measuredLargest measured tench: 38.3 cm | — |
| BleakAlburnus alburnus | 4 | 1993 | 49 | Median: 11.3 cm49 fish measuredLargest measured bleak: 14.8 cm | — |
| DaceLeuciscus leuciscus | 3 | 1994 | 58 | Median: 9.8 cm58 fish measuredLargest measured dace: 17.3 cm | — |
| Common carpCyprinus carpio | 3 | 1993 | 66 | Median: 17.3 cm66 fish measuredLargest measured common carp: 68.3 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 1 | 1993 | 3 | Median: 4.8 cm3 fish measuredLargest measured 3-spined stickleback: 5.3 cm | — |
| Spined loachCobitis taenia | 1 | 1990 | 1 | Recorded length: 9.3 cm1 fish measured | — |
| Stone loachBarbatula barbatula | 1 | 1993 | 1 | Recorded length: 10.8 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 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 →