River Main Porth

11 fish species have been recorded at 5 locations along the River Main Porth.

Records updated10 August 2026Most recent survey: 2015
Fish species
11
Places surveyed
5
Survey visits
13
Records span
1986–2015

Local EA evidence

Where fish were recorded

5 of 5 places shown

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.

FishSitesMost recentFish countedMeasured lengthMeasured weight
Brown / sea troutSalmo trutta520151,438Median: 12.4 cm531 fish measuredLargest measured brown / sea trout: 36.5 cm—
European eelAnguilla anguilla52015109Median: 19 cm109 fish measuredLargest measured european eel: 53 cm—
RoachRutilus rutilus3201510Median: 11.9 cm10 fish measuredLargest measured roach: 22.6 cm—
PerchPerca fluviatilis320156Median: 13.3 cm6 fish measuredLargest measured perch: 18.8 cm—
MinnowPhoxinus phoxinus31986———
Brook lampreyLampetra planeri220159Median: 10.7 cm9 fish measuredLargest measured brook lamprey: 13.6 cm—
Atlantic salmonSalmo salar2200624Median: 11.5 cm24 fish measuredLargest measured atlantic salmon: 13.7 cm—
FlounderPlatichthys flesus120152Median: 23 cm2 fish measuredLargest measured flounder: 24 cm—
GudgeonGobio gobio12006———
Common breamAbramis brama120152Median: 22.2 cm2 fish measuredLargest measured common bream: 22.5 cm—
RuddScardinius erythrophthalmus11986———

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 Main Porth. 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 →