How much types of trout are there?

There are several types of trout, primarily categorized into three main species: Salmo (true trout), Oncorhynchus (Pacific trout), and Salvelinus (char). Within these genera, there are numerous species, including the popular rainbow trout, brook trout, brown trout, and lake trout, among others. Overall, there are about 30 recognized species of trout worldwide, each with various subspecies and hybrids.