Complex sentence: In the water, besides several varieties of salmon including sockeye salmon, pink salmon, chum salmon, king salmon, and silver salmon, there are also rainbow trout, char, arctic grayling, and northern pike.
Split into simpler sentences: In the water, there are several varieties of salmon, including sockeye salmon, pink salmon, chum salmon, king salmon, and silver salmon. There are also rainbow trout, char, arctic grayling, and northern pike.