looks like S. compressus with red eyes, but they don't normally have red eyes...
it's hard to see the fins on this fish in this pic. Can't really make out a caudal pattern at all.
SO... I'm going with S. rhombeus FTW
it's hard to see the fins on this fish in this pic. Can't really make out a caudal pattern at all.
SO... I'm going with S. rhombeus FTW

its a piranha!