RiverFish

Bullhead · Cottus gobio

Bullhead in the River Lee

Largest measured bullhead: 9.8 cm

The largest bullhead measured in Environment Agency surveys of the River Lee was 9.8 cm, recorded at Amwell Loop on 27 July 2022.

Across 724 measured bullhead, the median measured length was 4.1 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 Lee.

See bullhead records across England →

Most recent observation23 July 2026Amwell Loop
Largest measured bullhead
9.8 cm
Median length
4.1 cm
Fish measured
724
Survey locations
16

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
9.8 cm27 Jul 2022Amwell Loop161669
9.5 cm27 Jul 2022Amwell Loop161669
9.5 cm9 Sept 2004Stanborough Park82083
9.3 cm22 Sept 2004Amwell Loop82419
9.2 cm27 Jul 2022Amwell Loop161669
9.2 cm27 Jul 2022Amwell Loop161669
9.2 cm27 Jul 2022Amwell Loop161669
9.2 cm27 Jul 2022Amwell Loop161669
9 cm27 Jul 2022Amwell Loop161669
8.8 cm27 Jul 2022Amwell Loop161669

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
Amwell Loop12 Apr 197823 Jul 202620
Fishers Green6 Sept 19787 Jul 202616
Wheathampstead8 Aug 20079 Jun 20266
Hackney Marshes29 Sept 200411 Sept 20255
Waterdale31 Oct 200331 Jul 20259
Red Spinners Bayford4 Aug 201717 Jul 20254
Stanborough Park10 Sept 200324 Jun 20259
Woolmers Park12 Sept 20033 Aug 20237
Hartham Leisure centre24 Jun 201924 Jun 20191
Hartham Common24 Oct 200212 Jul 20169
Kings Weir2 Jun 20152 Jun 20151
Kings Weir Back Loop14 May 201329 May 20142
Essendon11 Sept 200326 Jun 20137
Hyde Mill7 Jul 200920 Jun 20133
Bush hall27 Nov 200727 Nov 20071
Waterend8 Mar 19788 Mar 19781

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

1978–2026

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 724 measured fish were spread across different length ranges.

Smallest
0.5 cm
Lower quarter
3.4 cm
Median
4.1 cm
Upper quarter
5.4 cm
Largest
9.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lee

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

Roach Perch Gudgeon Minnow Chub Pike

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 →