River Mardyke
17 fish species have been recorded at 6 locations along the River Mardyke.
- Fish species
- 17
- Places surveyed
- 6
- Survey visits
- 46
- Records span
- 1986–2025
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 |
|---|---|---|---|---|---|
| European eelAnguilla anguilla | 6 | 2025 | 1,225 | Median: 41.1 cm636 fish measuredLargest measured european eel: 75.3 cm | Median: 4.7 oz (0.134 kg)633 fish weighedLargest measured: 2 lb 5.4 oz (1.06 kg) |
| 3-spined sticklebackGasterosteus aculeatus | 6 | 2019 | 81 | Median: 5.1 cm81 fish measuredLargest measured 3-spined stickleback: 7.2 cm | — |
| RoachRutilus rutilus | 5 | 2025 | 2,694 | Median: 13.2 cm2,694 fish measuredLargest measured roach: 28.3 cm | — |
| RuddScardinius erythrophthalmus | 5 | 2025 | 631 | Median: 9 cm631 fish measuredLargest measured rudd: 20.5 cm | — |
| TenchTinca tinca | 5 | 2025 | 265 | Median: 16.1 cm265 fish measuredLargest measured tench: 38.3 cm | — |
| Common carpCyprinus carpio | 5 | 2025 | 107 | Median: 30.7 cm107 fish measuredLargest measured common carp: 64.6 cm | — |
| Golden goldfishCarassius auratus | 5 | 2019 | 58 | Median: 12.9 cm58 fish measuredLargest measured golden goldfish: 35.5 cm | — |
| FlounderPlatichthys flesus | 5 | 2007 | 21 | Median: 12.8 cm21 fish measuredLargest measured flounder: 36.5 cm | Median: 0.2 oz (0.007 kg)3 fish weighedLargest measured: 15.9 oz (0.45 kg) |
| GudgeonGobio gobio | 5 | 2019 | 109 | Median: 5.2 cm109 fish measuredLargest measured gudgeon: 14.7 cm | — |
| PerchPerca fluviatilis | 4 | 2019 | 37 | Median: 17.9 cm37 fish measuredLargest measured perch: 47.9 cm | — |
| DaceLeuciscus leuciscus | 4 | 2007 | 29 | Median: 13.8 cm29 fish measuredLargest measured dace: 23.8 cm | — |
| Crucian carpCarassius carassius | 3 | 2007 | 17 | Median: 16.4 cm17 fish measuredLargest measured crucian carp: 19.6 cm | — |
| 10-spined sticklebackPungitius pungitius | 3 | 2019 | 6 | Median: 5 cm6 fish measuredLargest measured 10-spined stickleback: 5.5 cm | — |
| Common breamAbramis brama | 3 | 2007 | 23 | Median: 12.7 cm23 fish measuredLargest measured common bream: 24.2 cm | — |
| ChubLeuciscus cephalus | 3 | 2007 | 5 | Median: 23.5 cm5 fish measuredLargest measured chub: 30 cm | — |
| RuffeGymnocephalus cernuus | 1 | 2019 | 5 | Median: 15.5 cm5 fish measuredLargest measured ruffe: 18.9 cm | — |
| PikeEsox lucius | 1 | 2025 | 7 | Median: 20.4 cm7 fish measuredLargest measured pike: 62.3 cm | — |
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 Mardyke. 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 →