Fish ID

[Stitch]

The first 2 pictures are of the same species.
Can they be community fish? Seems fierce in the tank.

The last picture is a different type - a type of schooling fish?

[shrimppaste]

The first two are they piranha?

[shrimppaste]

They could also be red pacu and they grow HUGE!

[Stitch]

Hmm, I also cannot really differentiate the two after looking at the images from google.
I think it looks more like the red pacu as suggested. They are quite fierce in the tank.

[Stuporman]

Last one is black skirt tetra (Gymnocorymbus ternetzi).

[Stitch]

Yes, thanks all for the help.

[JasonChan]

Hi The picture is not very clear but from the shape to me it looks like pacu and not piranha best to have a cleaer picture of the jaw

[ok32115]

the first 2 does not have a red pacu shape.