Lincolnshire and Northamptonshire · Environment Agency surveys
What fish are in the Gwash?
Monitoring has recorded 25 species across 17 surveyed sites on this water, between 1990 and 2023. 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 trutta17 siteslatest 17 Aug 2023
- European eels > elversAnguilla anguilla17 siteslatest 17 Aug 2023
- DaceLeuciscus leuciscus12 siteslatest 17 Aug 2023
- GraylingThymallus thymallus12 siteslatest 17 Aug 2023
- BullheadCottus gobio11 siteslatest 17 Aug 2023
- RoachRutilus rutilus10 siteslatest 17 Aug 2023
- Common breamAbramis brama8 siteslatest 27 Mar 1996
- PerchPerca fluviatilis8 siteslatest 20 Jul 2017
- ChubLeuciscus cephalus7 siteslatest 17 Aug 2023
- Lampetra sp.Lampetra6 siteslatest 18 Jun 2015
- PikeEsox lucius5 siteslatest 17 Aug 2023
- Rainbow troutOncorhynchus mykiss5 siteslatest 5 Jul 2023
- 3-spined sticklebackGasterosteus aculeatus3 siteslatest 5 Jul 2023
- GudgeonGobio gobio2 siteslatest 27 Mar 1996
- MinnowPhoxinus phoxinus2 siteslatest 29 Sept 2016
- River lampreyLampetra fluviatilis2 siteslatest 28 Mar 1996
- RuddScardinius erythrophthalmus2 siteslatest 11 Sept 2018
- TenchTinca tinca2 siteslatest 3 Jun 2015
- Brook lampreyLampetra planeri1 sitelatest 9 Mar 1993
- Common [wild] carpCyprinus carpio1 sitelatest 9 Mar 1993
- European eelAnguilla anguilla1 sitelatest 12 Sept 2013
- Lampetra sp. > ammocoeteLampetra1 sitelatest 25 Jun 2013
- Lamprey sp.Petromyzontidae1 sitelatest 16 Jun 2015
- Lamprey sp. > ammocoetePetromyzontidae1 sitelatest 4 Jun 2014
- Stone loachBarbatula barbatula1 sitelatest 10 Jun 2014
Surveyed sites on this water
17 shown, newest survey first
Foundry Road
- Survey events
- 13
- Observed taxa
- 12
- Latest survey
- 17 Aug 2023
U/S White Post Bridge
- Survey events
- 15
- Observed taxa
- 12
- Latest survey
- 15 Aug 2023
Church bridge - u/s Empingham
- Survey events
- 12
- Observed taxa
- 15
- Latest survey
- 5 Jul 2023
Flow Project - U/S Gt. Casterton STW
- Survey events
- 4
- Observed taxa
- 5
- Latest survey
- 12 Sept 2018
Belmesthorpe Meadow
- Survey events
- 10
- Observed taxa
- 13
- Latest survey
- 7 Sept 2018
Flow Project - DS Great Casterton STW
- Survey events
- 2
- Observed taxa
- 4
- Latest survey
- 2 Nov 2015
Great Casterton
- Survey events
- 6
- Observed taxa
- 8
- Latest survey
- 18 Jun 2015
D/S Ryhall STW Flow project site
- Survey events
- 1
- Observed taxa
- 7
- Latest survey
- 14 May 2015
U/S Ryhall STW - Flow project Site
- Survey events
- 1
- Observed taxa
- 7
- Latest survey
- 14 May 2015
Ingthorpe
- Survey events
- 5
- Observed taxa
- 7
- Latest survey
- 16 Jun 2014
D/S North Brook
- Survey events
- 4
- Observed taxa
- 6
- Latest survey
- 26 Jun 2013
D/S Ingthorpe Road Bridge
- Survey events
- 4
- Observed taxa
- 10
- Latest survey
- 25 Jun 2013
Shacklewell Lodge Ingthorpe
- Survey events
- 3
- Observed taxa
- 7
- Latest survey
- 17 May 2012
Friths Farm
- Survey events
- 6
- Observed taxa
- 9
- Latest survey
- 5 Jul 2011
Little Casterton
- Survey events
- 5
- Observed taxa
- 7
- Latest survey
- 5 Jul 2011
Tolethorpe
- Survey events
- 1
- Observed taxa
- 3
- Latest survey
- 2 Aug 2006
Newstead Mill
- Survey events
- 3
- Observed taxa
- 6
- Latest survey
- 3 Apr 1996
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