If you were an oyster, the last thing you'd want is a ray with a crush on you.
Bone is certainly a wonderfully strong material.
It lets hyenas crush carcasses with their jaws and enables elephants to support their massive bodies. Bone tissue is crammed with cells known as osteocytes and blood vessels that keep them nourished. The osteocytes release calcium, phosphates, and other minerals, which help make bones strong. They form layers that wrap around the outside of the bone and create a dense web of branching columns inside it. The result is a softness and flexibility that imply a certain weakness.