Fish species in the Western Interior Seaway

The Western Interior Seaway, was a large inland sea that started to expand in the early Cretaceous period, though geological evidence suggests it started to expand in the late Jurassic period. It existed at its fullest extent from the mid-late Cretaceous period. At its greatest extent it was 600 mi wide, 2,000 mi long, and had a depth maximum depth of 2,500 ft.

Various different species of fish existed in the Western Interior Seaway, throughout its 30 million time frame. Examples of which