If one creature can show us that genetics doesn’t entirely explain the differences in form that life takes it is brown trout (Salmo trutto). Little freshwater dwelling brown trout, sea faring trout and giant ferox trout are all the same species. Golden brown backs, yellow bellies and red and black spots make brown trout far more colourful than their name suggests. They inhabit well oxygenated, cool and fast flowing freshwater. They catch their diet of small fish and insects by ambush. When it is time to spawn they mingle with fellow brown trout, and also with visiting sea trout.