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Historic monitoring evidence · Environment Agency

Trehannick

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.

30survey events
17 Jul 1980first recorded survey
14 Aug 2025latest recorded survey
8observed taxa shown

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
17 Jul 1980
Latest record
14 Aug 2025
Survey events
30

Atlantic salmon

Salmo salar
First record
17 Jul 1980
Latest record
14 Aug 2025
Survey events
25

Bullhead

Cottus gobio
First record
25 Jul 2006
Latest record
14 Aug 2025
Survey events
15

European eels > elvers

Anguilla anguilla
First record
28 Aug 2003
Latest record
14 Aug 2025
Survey events
13

Brook lamprey ammocoetes

Lampetra planeri
First record
12 Jul 2011
Latest record
14 Aug 2025
Survey events
9

European elvers

Anguilla anguilla
First record
21 Aug 2019
Latest record
21 Aug 2019
Survey events
1

Brook lamprey

Lampetra planeri
First record
25 Jul 2006
Latest record
27 Jul 2010
Survey events
2

European eel

Anguilla anguilla
First record
17 Jul 1980
Latest record
13 Aug 2009
Survey events
16

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 rules

Provenance

Source, licence and boundary

Open the official dataset