Is there any boneless fish in the world?

No, there is no such thing as a completely boneless fish in the world. All fish have some form of skeletal structure, even if it's just cartilage.

While some fish have very small bones, like sardines or anchovies, they still have a skeleton.

Here's why:

* Structure and Support: Bones provide structural support for the fish, allowing it to swim, move, and maintain its shape.

* Movement: Bones attach to muscles, enabling movement and swimming.

* Protection: Bones protect vital organs.

Even fish with a primarily cartilaginous skeleton, like sharks and rays, still have a skeletal structure.

So, while some fish bones are very small and may be easily eaten, all fish have some form of skeletal system.