The Great Barracuda is the shark of the bony fish world. They don't have to keep moving, but they behave more like shark than a tuna. One reason is that, like a shark, you can attract a Great Barracuda by swiming with jewlery on. Barracudas often mistake jewlery for scales of fish. Unlike a shark, a Great Barracuda bite is going to be more painful because their lower jaw has teeth that look fangs. Put these "fangs" in a school and that's going to slice you to ribbons.