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Undulata Cropped

The rays can measure up to 2 meters (79 inches), are marine cartilaginous fish and belong to the group that also contains sharks. They have a diamond-shaped body and a pointed tail that, in some species, has a thorn with poison at the tip.

They like to rest in sandy bottoms, where they sometimes hide and look for food, digging up small clams and oysters, their favorite snack, through a very effective strategy of alternating blowing and sucking.

They are usually harmless, but when they feel threatened, they can use their sharp thorns at the tip of their tails to cause lethal damage.