How are the bones arranged in a ray-fin?

In ray-finned fish, the bones are arranged in a structure known as the fin rays, which are elongated, flexible bony elements that support the fins. These rays are typically made up of a series of segmented bones called lepidotrichia, which are connected by soft tissue. The arrangement allows for a wide range of movement and flexibility in the fins, aiding in swimming and maneuverability. The structure of ray-finned fish fins is distinct from those of lobe-finned fish, which have a more complex arrangement with a single central axis.