 The formation has a large cartilaginous fish assemblage, mainly belonging to the ground sharks, such as requiem sharks and hammerhead sharks; and, to a lesser extent, mackerel sharks, such as white sharks, sand sharks, and Otodontidae.Many shark teeth were associated with the extinct broad-tooth mako ("Cosmopolitodus hastalis") and megalodon ("Carcharocles megalodon").Other cartilaginous fish include eagle rays, sawfish, and angelsharks.