Historic monitoring evidence · Environment Agency
Denver Sluice
East Anglia · survey site
This page records ecological survey evidence. It is not proof of current fish presence, abundance, fishing quality, access, permission or safety at this location.
Observed taxa
What monitoring recorded here
Taxa are ordered by latest survey date. Counts and records reflect monitoring events, not an angling forecast.
Roach
Rutilus rutilus- First record
- 6 May 1986
- Latest record
- 22 Jun 2023
- Survey events
- 14
Perch
Perca fluviatilis- First record
- 6 May 1986
- Latest record
- 22 Jun 2023
- Survey events
- 13
Common bream
Abramis brama- First record
- 6 May 1986
- Latest record
- 22 Jun 2023
- Survey events
- 12
Pike
Esox lucius- First record
- 18 May 1994
- Latest record
- 22 Jun 2023
- Survey events
- 11
Silver bream
Abramis bjoerkna- First record
- 6 May 1986
- Latest record
- 22 Jun 2023
- Survey events
- 8
Tench
Tinca tinca- First record
- 6 May 1986
- Latest record
- 22 Jun 2023
- Survey events
- 8
European eels > elvers
Anguilla anguilla- First record
- 6 May 1986
- Latest record
- 22 Jun 2023
- Survey events
- 6
Bleak
Alburnus alburnus- First record
- 4 Apr 2017
- Latest record
- 22 Jun 2023
- Survey events
- 2
Rudd
Scardinius erythrophthalmus- First record
- 20 Jun 2012
- Latest record
- 22 Jun 2023
- Survey events
- 2
Bitterling
Rhodeus sericeus- First record
- 4 Apr 2017
- Latest record
- 22 Jun 2023
- Survey events
- 2
Ruffe
Gymnocephalus cernuus- First record
- 6 May 1986
- Latest record
- 4 Apr 2017
- Survey events
- 11
3-spined stickleback
Gasterosteus aculeatus- First record
- 22 Apr 2014
- Latest record
- 4 Apr 2017
- Survey events
- 2
Stone loach
Barbatula barbatula- First record
- 4 Apr 2017
- Latest record
- 4 Apr 2017
- Survey events
- 1
Zander
Sander lucioperca- First record
- 6 May 1986
- Latest record
- 22 Apr 2014
- Survey events
- 8
Roach x common bream hybrid
Rutilus rutilus x Abramis brama- First record
- 17 Jul 1990
- Latest record
- 20 Jun 2012
- Survey events
- 7
Gudgeon
Gobio gobio- First record
- 6 May 1986
- Latest record
- 23 Jun 2004
- Survey events
- 2
Spined loach
Cobitis taenia- First record
- 15 Jul 1997
- Latest record
- 23 Jun 2004
- Survey events
- 2
Flounder
Platichthys flesus- First record
- 15 Jul 1997
- Latest record
- 15 Jul 1997
- Survey events
- 1
Smelt
Osmerus eperlanus- First record
- 15 Jul 1997
- Latest record
- 15 Jul 1997
- Survey events
- 1
Rules and access
Check before you travel.
Environment Agency ecology records do not carry fishing-rights boundaries or live restrictions. Confirm the fishery owner, permission, local byelaws, seasonal rules, safety notices and current conditions before setting out.
Check live freshwater fishing rulesProvenance
Source, licence and boundary
- SourceEnvironment Agency Ecology & Fish Data
- LicenceOpen Government Licence v3.0
- Source copy retrieved23 Jul 2026
- Terms checked23 Jul 2026
- CoverageHistoric monitoring evidence, separately dated per record
- Not assertedCurrent presence, access, permission, fishing quality or safety