Environment Agency - Home

Spotlight on fish species and wildlife

In this section we outline the natural history and biology of some of our more common freshwater fish. It is important for anglers to have an appreciation of and respect for their quarry. The more you know about a fish, the more enjoyable the fishing experience.

Also find our Golden Rules for protecting wildlife and the regulations that cover fishing for crayfish.

  • Why non-native fish pose a threat to our fish stocks

    The introduction of non-native fish species to our waters is not a new phenomenon.

  • Non-native Fish

    Find out more about non-native fish species that are a significant threat to biodiversity.

  • Gyrodactylus salaris

    Gyrodactylus salaris is spreading through Europe and threatening the UK's salmon population. Find out how you can help stop this parasite entering the UK.

  • Crayfish

    These pages contain information on native species and the threat that non-native species pose. Also find information on trapping crayfish.

  • Carp

    Carp are extraordinarily adaptable, which makes them very popular with anglers

  • Barbel

    The barbel is gaining in popularity amongst anglers

  • Pike

    The pike is one of the world's first-class freshwater predators

  • Eels

    The eel fishery is the most valuable commercial inland fishery in England and Wales.

  • Roach

    One of the most popular fish among anglers