River Marlow
16 fish species have been recorded at 3 locations along the River Marlow.
- Fish species
- 16
- Places surveyed
- 3
- Survey visits
- 39
- Records span
- 2003–2025
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 |
|---|---|---|---|---|---|
| MinnowPhoxinus phoxinus | 2 | 2025 | 13,780 | Median: 2.5 cm1,840 fish measuredLargest measured minnow: 6.6 cm | — |
| GudgeonGobio gobio | 2 | 2025 | 1,445 | Median: 3.8 cm859 fish measuredLargest measured gudgeon: 14.5 cm | — |
| ChubLeuciscus cephalus | 2 | 2025 | 1,602 | Median: 3 cm881 fish measuredLargest measured chub: 38.3 cm | — |
| RoachRutilus rutilus | 2 | 2025 | 5,310 | Median: 3.5 cm1,764 fish measuredLargest measured roach: 13.4 cm | — |
| BleakAlburnus alburnus | 2 | 2024 | 1,487 | Median: 2.8 cm812 fish measuredLargest measured bleak: 8.5 cm | — |
| DaceLeuciscus leuciscus | 2 | 2025 | 698 | Median: 4.9 cm519 fish measuredLargest measured dace: 11.6 cm | — |
| PerchPerca fluviatilis | 2 | 2025 | 130 | Median: 5.5 cm109 fish measuredLargest measured perch: 10.6 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 2 | 2025 | 88 | Median: 2.9 cm76 fish measuredLargest measured 3-spined stickleback: 4 cm | — |
| BullheadCottus gobio | 2 | 2024 | 65 | Median: 4 cm65 fish measuredLargest measured bullhead: 5.7 cm | — |
| RuffeGymnocephalus cernuus | 2 | 2016 | 54 | Median: 5 cm49 fish measuredLargest measured ruffe: 9.7 cm | — |
| Stone loachBarbatula barbatula | 2 | 2025 | 33 | Median: 4.5 cm33 fish measuredLargest measured stone loach: 9.8 cm | — |
| BarbelBarbus barbus | 2 | 2024 | 7 | Median: 3.8 cm5 fish measuredLargest measured barbel: 4.8 cm | — |
| Common breamAbramis brama | 2 | 2010 | 4 | Median: 3 cm4 fish measuredLargest measured common bream: 3.2 cm | — |
| TenchTinca tinca | 2 | 2007 | 4 | Median: 4 cm4 fish measuredLargest measured tench: 5.2 cm | — |
| PikeEsox lucius | 1 | 2012 | 3 | Median: 26.3 cm3 fish measuredLargest measured pike: 80 cm | — |
| European eelAnguilla anguilla | 1 | 2012 | 1 | Recorded length: 29 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 Marlow. 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 →