Trehannick
5 fish species: Atlantic salmon, Brook lamprey, Brown / sea trout, Bullhead, European eel
Fish records for anglers
River Main Allen
Explore 13 fish species recorded at 19 places along the river from 1980 to 2025.
Records updated10 August 2026Most recent survey: 2025
- Fish species
- 13
- Places surveyed
- 19
- Survey visits
- 173
- Records span
- 1980–2025
Explore the river
See where fish were found
19 of 19 places shown
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.
Fish in this river
Species recorded
Choose a fish to highlight the places where surveyors found it.
| Fish | Places found | Survey visits | Last recorded |
|---|---|---|---|
| Salmo trutta | 19 | 173 | 14 Aug 2025 |
| Cottus gobio | 17 | 108 | 14 Aug 2025 |
| Anguilla anguilla | 16 | 157 | 14 Aug 2025 |
| Salmo salar | 14 | 128 | 14 Aug 2025 |
| Lampetra planeri | 7 | 22 | 14 Aug 2025 |
| Barbatula barbatula | 3 | 8 | 31 May 2001 |
| Phoxinus phoxinus | 1 | 8 | 20 Jul 2000 |
| Platichthys flesus | 1 | 7 | 9 Jul 1999 |
| Gasterosteus aculeatus | 1 | 3 | 20 Jul 2000 |
| Carassius carassius | 1 | 1 | 7 Jun 1991 |
| Carassius auratus | 1 | 1 | 30 Jun 1998 |
| Oncorhynchus mykiss | 1 | 1 | 30 Jun 1994 |
| Rutilus rutilus | 1 | 1 | 20 Jun 1998 |
These totals show where a species has been recorded, not how many are in the river today.
Latest activity
Recent survey visits
Upstream Littlewood Mill
2 fish species: Brown / sea trout, Bullhead
Hillside
2 fish species: Brown / sea trout, Bullhead
Downstream Trehannick
2 fish species: Brown / sea trout, Bullhead
About this page
Useful context
This page follows survey locations along the main River Main Allen. Tributaries and unrelated rivers with similar names are kept separate.
The map shows past fish records, not fishing access or a promise of what you’ll catch today.
How RiverFish handles the data →