What is the name of this dangerous freshwater fish?

i had no idea they were that big.

I’ve heard word they are fine in solitary but in groups or when blood is detected in the water well then look out coz a feeding frenzy will ensue.

easy-pesy

Player #20261574, candiru are long and silvery. They're known as pencil fish

Piranhas are very tasty. Caught a few in the amazon river.