RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Blackwater (Reepham)

Largest measured gudgeon: 15.5 cm

The largest gudgeon measured in Environment Agency surveys of the River Blackwater (Reepham) was 15.5 cm, recorded at Downstream Blackwater Bridge on 5 April 1990.

Across 82 measured gudgeon, the median measured length was 10.7 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Blackwater (Reepham).

See gudgeon records across England →

Most recent observation24 April 2003Downstream Eades Mill · 1 fish
Largest measured gudgeon
15.5 cm
Median length
10.7 cm
Fish measured
82
Survey locations
2

Individual EA measurements

Largest measured gudgeon

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
15.5 cm5 Apr 1990Downstream Blackwater Bridge17140
15 cm5 Apr 1990Downstream Blackwater Bridge17140
14.3 cm5 Apr 1990Downstream Blackwater Bridge17140
14.3 cm5 Apr 1990Downstream Blackwater Bridge17140
14.3 cm5 Apr 1990Downstream Blackwater Bridge17140
14.2 cm5 Apr 1990Downstream Blackwater Bridge17140
14.2 cm5 Apr 1990Downstream Blackwater Bridge17140
14 cm5 Apr 1990Downstream Blackwater Bridge17140
14 cm5 Apr 1990Downstream Blackwater Bridge17140
14 cm5 Apr 1990Downstream Blackwater Bridge17140

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where gudgeon were found

Each point marks a survey location with at least one gudgeon record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding gudgeon
Downstream Eades Mill4 Apr 199024 Apr 20033
Downstream Blackwater Bridge7 Mar 198618 Jun 19974

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1986–2003

Survey records by year

Each bar shows how many survey visits recorded gudgeon that year.

Fish measured by surveyors

Measured length distribution

See how the 82 measured fish were spread across different length ranges.

Smallest
5.9 cm
Lower quarter
7.4 cm
Median
10.7 cm
Upper quarter
13.2 cm
Largest
15.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Blackwater (Reepham)

Compare other species with enough survey and measurement data for a detailed page.

Brown / sea trout Bullhead Stone loach Chub Minnow 3-spined stickleback

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →