What are three adaptations of a cartilaginous fish?

1. Cartilage skeleton: Cartilaginous fish have a skeleton made of cartilage instead of bone. Cartilage is lighter and more flexible than bone, which makes these fish more buoyant and agile.

2. Gills: Cartilaginous fish have gills instead of lungs. Gills are specialized structures that allow the fish to extract oxygen from the water.

3. Paired fins: Cartilaginous fish have paired fins, including pectoral fins and pelvic fins. These fins help the fish to steer and maneuver in the water.