Is a lamprey bony fish?

No, lampreys are not bony fish. They belong to a separate class of jawless vertebrates called Agnatha.

Here's why:

* Lack of bones: Lampreys have a cartilaginous skeleton, meaning their internal framework is made of cartilage, not bone.

* Primitive features: Lampreys are considered more primitive than bony fish, with features like a lack of jaws and paired fins.

So while they live in water and breathe with gills like fish, they are not classified as bony fish.