Do mantarays have a barb on tail?

Yes, most mantarays have a venomous spine on their tail. The spine is located on the dorsal side of the tail, and it can be up to 10 inches long. The spine is barbed, and it can inflict a painful wound if it comes into contact with human skin. The venom from the spine is not deadly, but it can cause severe pain, swelling, and nausea.