Trout
From Cookipedia
Trout is the common name given to a number of species of freshwater fish belonging to the Salmonidae family, which includes salmon, trout, chars, freshwater whitefishes and graylings.
In the UK trout for sale in fishmongers and supermarkets is very likely to be rainbow trout or brown trout.
Trout make very good eating, though relatively bony, they have a good flavour and firm white flesh. Trout is used both fresh and smoked and it may be eaten fried, barbecued, grilled, baked or even microwaved.