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when the usually non-aggressive creatures feel threatened or are trodden on, they are capable of delivering horrific, agonising injuries by lashing out with the razor-sharp, barbed sting at the end of their tails. The barbs, which grow out of the bayonet-like sting like fingernails, are designed to snag in the flesh of the ray's unwary victim. Each barb is serrated and can be up to 20cm (8ins) long, and is coated with a paralysing toxin which the ray secretes along two grooves in its tail. It is only when the barb enters the body through the chest area, so that the heart or other vital organs are damaged and the poison is administered directly, causing the blood vessels to constrict, that very serious injuries can occur and death is more likely.
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