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Acipenseridae (sturgeons)
Polyodontidae (paddlefishes)
Chondrosteidae extinct
Errolichthyidae extinct Acipenseriformes is an order of primitive ray-finned fishes that includes the sturgeons and paddlefishes, when well as a select few out families.

Acipenseriform skeletons are largely cartilage.

Acipenser fulvescens (Lake Sturgeon)
North American freshwater fish. Narrative includes physical description, natural history, and economic value.