Historic monitoring evidence · Environment Agency
Trewerry Mill
Devon and Cornwall and the Isles of Scilly · 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
- 9 May 1986
- Latest record
- 20 May 2021
- Survey events
- 3
European eels > elvers
Anguilla anguilla- First record
- 30 Aug 2000
- Latest record
- 20 May 2021
- Survey events
- 2
Brook lamprey ammocoetes
Lampetra planeri- First record
- 20 May 2021
- Latest record
- 20 May 2021
- Survey events
- 1
Bullhead
Cottus gobio- First record
- 9 May 1986
- Latest record
- 30 Aug 2000
- Survey events
- 2
Lampetra sp.
Lampetra- First record
- 30 Aug 2000
- Latest record
- 30 Aug 2000
- 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