ID Please? :)

[thebestincali2000]

good score.they look cool

 

[loach43]

looks like a juvie Tilapia Buttikoferi to me. Fear for the life of your other fish.

 

[loach43]

Nahhh, changed my mind. Here's a website that has a juvie butti pic (scroll down).http://aqualandpetsplus.com/Cichlid, Buttikoferi.htm
Similar but I don't recall ever seeing one with red eyes.
Either way, eat it and don't re-release it. Tilapia are opportunistic pests in the wild. Ask anyone in Mexico.