Although it is commonly called the undulate ray, it is actually a species of skate (sometimes known as the undulate skate). ... Skates have a short tail with small fins and no stinging capabilities, whereas rays have a long whip-like tail.

Can you eat undulate ray?

Avoid eating this species, regardless of method used to catch it.

Are thornback rays poisonous?

An identifying characteristic is a pattern of one to three parallel rows of very sharp, pale, curved or hooked, prominent spines or thorns that extend from the back to usually well down the tail. Their spines are not venomous.