Yes they can its a very keen nose they have they can sense blood for up to 2 miles they have the same sense as sharks. I tested this myself one day with mine i cut my foot bad by stepping on glass accidently and put a drop or two in there and my piranhas who are usually timid went nuts
Sharks all the way.
there not blood thirst visous things like they are made out to be they are like scanvers they eat almost anyhring
Piranhas only attack when hungry or threatened
No because of how vicious piranhas are they will try to eat young
both can be as dangerous as they attack when they smell blood in the water. However as piranhas hunt in groups of up to 20 i believe piranhas are more dangerous.
not all the time they can if they are really hungry.
The piranha is known for its keen sense of smell, which helps them to locate prey. Blood in the water will send piranhas into a frenzy. They are also able to sense any unusual vibrations in the water around them and any commotion in the water will attract a shoal of piranhas.
eather it just farted or its hungry,cats smell when their hungry
piranhas eat humans beacause theyare attracted to blood
there cold blood there cold blood there cold blood
food, water, ummm their sense of smell....
If hungry yes but they mostly eat other fish. It really depends on the condition.