Can a Piranha eat a shark? March 30, 2012 Asks Harriet. Winfield quickly responds, “Nope! Even if the shark is dead the denticles on the shark’s skin will get caught in the piranha’s throat.” I then had to go look up denticles on wikipedia. Coolness is just something that you’re born with… Previous Post Same kid, different… Next Post BACK TO TOP|CONTACT ME no comments Johanna Poole - its official, win is smarter than me.