A very unique kind of ray is called the sawfish. They have an elongated snout that resembles a saw, which is called their rostrum. Although their "sawblade" may look to have sharp teeth, these are actually denticles, which are a specific kind of scale that are significant with sharks and rays - and feels like sandpaper to the touch. Sawfish are endangered and at risk of extinction, mostly due to overfishing and habitat destruction. A very unique kind of ray is called the sawfish. They have an elongated snout that resembles a saw, which is called their rostrum. Although their "sawblade" may look to have sharp teeth, these are actually denticles, which are a specific kind of scale that are significant with sharks and rays - and feels like sandpaper to the touch. Sawfish are endangered and at risk of extinction, mostly due to overfishing and habitat destruction.