Historic monitoring evidence · Environment Agency
Tidmarsh
Thames · 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.
Brown / sea trout
Salmo trutta- First record
- 25 Aug 2004
- Latest record
- 23 Sept 2025
- Survey events
- 18
Grayling
Thymallus thymallus- First record
- 25 Aug 2004
- Latest record
- 23 Sept 2025
- Survey events
- 18
Bullhead
Cottus gobio- First record
- 25 Aug 2004
- Latest record
- 23 Sept 2025
- Survey events
- 17
Minnow
Phoxinus phoxinus- First record
- 25 Aug 2004
- Latest record
- 23 Sept 2025
- Survey events
- 17
Chub
Leuciscus cephalus- First record
- 20 Sept 2007
- Latest record
- 23 Sept 2025
- Survey events
- 10
Gudgeon
Gobio gobio- First record
- 18 Aug 2010
- Latest record
- 23 Sept 2025
- Survey events
- 5
Stone loach
Barbatula barbatula- First record
- 18 Aug 2010
- Latest record
- 23 Sept 2025
- Survey events
- 4
Lamprey sp. > ammocoete
Petromyzontidae- First record
- 27 Sept 2022
- Latest record
- 23 Sept 2025
- Survey events
- 2
European eels > elvers
Anguilla anguilla- First record
- 23 Sept 2025
- Latest record
- 23 Sept 2025
- Survey events
- 1
Perch
Perca fluviatilis- First record
- 20 Sept 2007
- Latest record
- 25 Oct 2023
- Survey events
- 7
Tench
Tinca tinca- First record
- 25 Oct 2023
- Latest record
- 25 Oct 2023
- Survey events
- 1
Rainbow trout
Oncorhynchus mykiss- First record
- 25 Aug 2004
- Latest record
- 13 Sept 2018
- Survey events
- 11
Pike
Esox lucius- First record
- 18 Aug 2010
- Latest record
- 13 Sept 2018
- Survey events
- 7
Dace
Leuciscus leuciscus- First record
- 13 Sept 2012
- Latest record
- 3 Sept 2015
- Survey events
- 2
European eel
Anguilla anguilla- First record
- 18 Aug 2010
- Latest record
- 18 Aug 2010
- 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