Devon and Cornwall and the Isles of Scilly · Environment Agency surveys
What fish are in the Main Allen (Devon and Cornwall and the Isles of Scilly)?
Monitoring has recorded 9 species across 24 surveyed sites on this water, between 1980 and 2025. These are survey records with dates. They do not establish what is present today, that the water is fishable, or that you have permission to fish it.
Recorded species
What monitoring has found here
Ordered by how many sites on this water recorded the species. A species not listed has not been recorded by these surveys — which is not the same as being absent.
- Brown / sea troutSalmo trutta24 siteslatest 14 Aug 2025
- Atlantic salmonSalmo salar14 siteslatest 14 Aug 2025
- BullheadCottus gobio14 siteslatest 14 Aug 2025
- European eelAnguilla anguilla13 siteslatest 13 Aug 2009
- European eels > elversAnguilla anguilla13 siteslatest 14 Aug 2025
- Brook lamprey ammocoetesLampetra planeri10 siteslatest 14 Aug 2025
- European elversAnguilla anguilla6 siteslatest 17 Aug 2022
- Brook lamprey > ammocoeteLampetra planeri2 siteslatest 12 Oct 2021
- Brook lampreyLampetra planeri1 sitelatest 27 Jul 2010
Surveyed sites on this water
24 shown, newest survey first
Trehannick
- Survey events
- 30
- Observed taxa
- 8
- Latest survey
- 14 Aug 2025
U/S Littlewood Mill
- Survey events
- 2
- Observed taxa
- 4
- Latest survey
- 31 Jul 2024
Hillside
- Survey events
- 2
- Observed taxa
- 3
- Latest survey
- 26 Jul 2024
D/S Trehannick
- Survey events
- 2
- Observed taxa
- 2
- Latest survey
- 19 Jul 2024
Pengenna
- Survey events
- 2
- Observed taxa
- 3
- Latest survey
- 10 Jul 2024
Lamellan
- Survey events
- 17
- Observed taxa
- 7
- Latest survey
- 22 Aug 2023
Mutley
- Survey events
- 3
- Observed taxa
- 1
- Latest survey
- 17 Aug 2023
Scawswater Mill
- Survey events
- 4
- Observed taxa
- 6
- Latest survey
- 15 Aug 2023
Littlewood Mill
- Survey events
- 18
- Observed taxa
- 7
- Latest survey
- 10 Aug 2023
Treforda
- Survey events
- 18
- Observed taxa
- 6
- Latest survey
- 7 Aug 2023
Dinhams Bridge
- Survey events
- 15
- Observed taxa
- 7
- Latest survey
- 21 Jun 2023
Daubuz's Moor
- Survey events
- 4
- Observed taxa
- 6
- Latest survey
- 17 Aug 2022
Lanner Mill
- Survey events
- 2
- Observed taxa
- 4
- Latest survey
- 20 May 2022
Trehannick Saw Mill (control)
- Survey events
- 1
- Observed taxa
- 3
- Latest survey
- 28 Sept 2011
Trehannick Saw Mill (restored)
- Survey events
- 1
- Observed taxa
- 6
- Latest survey
- 27 Sept 2011
Trevia
- Survey events
- 14
- Observed taxa
- 4
- Latest survey
- 29 Jun 2006
d/s Knightsmill
- Survey events
- 13
- Observed taxa
- 3
- Latest survey
- 15 Sept 2003
u/s Trewen
- Survey events
- 10
- Observed taxa
- 3
- Latest survey
- 9 Sept 2003
Lanteglos
- Survey events
- 11
- Observed taxa
- 3
- Latest survey
- 11 Sept 2002
Allenbrook
- Survey events
- 2
- Observed taxa
- 3
- Latest survey
- 4 Sept 2001
Kestlewood
- Survey events
- 10
- Observed taxa
- 3
- Latest survey
- 20 Jul 2000
d/s Trewen
- Survey events
- 2
- Observed taxa
- 3
- Latest survey
- 2 Jul 1990
Ladys Wood
- Survey events
- 1
- Observed taxa
- 1
- Latest survey
- 16 Jul 1986
Trenerry Wood
- Survey events
- 1
- Observed taxa
- 1
- Latest survey
- 15 Jul 1986
Provenance
Source and licence
- SourceEnvironment Agency Ecology & Fish Data
- LicenceOpen Government Licence v3.0
- Source copy retrieved23 Jul 2026
- Waterbody nameAs published by the Environment Agency
- Not assertedCurrent presence, access, permission, fishing quality or safety