Brown or Sea Trout Salmo trutta
A fierce predator of small fish and flying insects, the brown trout is widespread in our freshwater rivers and coastal areas around Britain and Ireland. While trout are considered a freshwater species they are also found in saltwater, the difference comes from the fact that although all trout hatch in freshwater some migrate to the sea and may live there for years (sea trout). It is has a golden body, flanked with pale-ringed, dark spots. Image: Christa Rohrback (iNaturalist).