RiverFish

Bullhead · Cottus gobio

Bullhead in the River Deben (Main Reaches)

Largest measured bullhead: 9.4 cm

The largest bullhead measured in Environment Agency surveys of the River Deben (Main Reaches) was 9.4 cm, recorded at Downstream Glevering Hall on 11 April 2025.

Across 296 measured bullhead, the median measured length was 5.9 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 Deben (Main Reaches).

See bullhead records across England →

Most recent observation21 April 2026Upstream Cretingham · 18 fish
Largest measured bullhead
9.4 cm
Median length
5.9 cm
Fish measured
296
Survey locations
10

Individual EA measurements

Largest measured bullhead

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

LengthSurvey dateSurvey locationSurvey ID
9.4 cm11 Apr 2025Downstream Glevering Hall177615
9.1 cm19 Apr 2024Upstream Cretingham164870
9.1 cm19 Apr 2016Upstream Kettleburgh148014
9 cm10 Apr 2025Upstream Cretingham177616
8.9 cm10 Apr 2025Upstream Cretingham177616
8.9 cm19 Apr 2024Upstream Cretingham164870
8.9 cm18 May 2016Ufford148112
8.5 cm11 Apr 2025Downstream Glevering Hall177615
8.5 cm19 Apr 2024Upstream Cretingham164870
8.5 cm19 Apr 2024Upstream Cretingham164870

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

Explore the river

Where bullhead were found

Each point marks a survey location with at least one bullhead 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 bullhead
Upstream Cretingham15 Apr 201621 Apr 20264
Downstream Glevering Hall28 Apr 201014 Apr 20264
White Womans Lane Fry Survey19 Sept 202519 Sept 20251
Glevering Mill Fry Survey19 Sept 202519 Sept 20251
Downstream Sanctuary Bridge Fry Survey25 Sept 202418 Sept 20252
Crettingham Fry Survey25 Sept 202418 Sept 20252
Ufford30 Apr 201014 Apr 20254
Upstream Kettleburgh27 Apr 201021 Apr 20223
Downstream Wickham Market29 Apr 201029 Apr 20101
Upstream Glovering House3 Mar 20043 Mar 20041

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

2004–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 296 measured fish were spread across different length ranges.

Smallest
2.8 cm
Lower quarter
5 cm
Median
5.9 cm
Upper quarter
6.7 cm
Largest
9.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Deben (Main Reaches)

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

Roach Pike European eel Perch Stone loach Dace

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 →