Among them is the Mekong giant catfish, which is the size of a bull shark, and the Mekong stingray, which can weigh up to 600kg.
If you step on a stingray and get the spine inside your leg, it hurts very badly.
An elderly Florida man is in critical condition after a stingray jumped onto his boat and stung him in the chest.
The 81-year-old Florida man fared better than Crocodile Hunter Steve Irwin, who was killed in 2006 when a stingray struck him in the heart.
The renowned Australian naturalist Steve Irwin has died after being struck in the chest by a stingray barb.
The man known as the "Crocodile Hunter" was killed Monday in a freak accident when a stingray barb pierced his heart as he taped an underwater documentary.
Bertakis was impaled when a stingray jumped into his boat and hit him directly in the chest.
With its triangular shape and long 'tail', it really does look like a stingray.
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