- Cartilaginous fish
- Sharks, rays and skates
- No swim bladder
- Skeleton made of cartilage
Acipenseriformes
- Sturgeons and paddlefish
- Primitive bony fish with cartilaginous skeletons
- Scavengers or predators
- Found in freshwater rivers and lakes
Amia calva
- Bowfin
- Primitive bony fish with ganoid scales
- Found in freshwater habitats
- Carnivore
Lepisosteus spp.
- Gar
- Primitive bony fish with ganoid scales
- Found in freshwater habitats
- Carnivore