Aequidens for sure , but it's a bit of a toss up as to which one for me. I'm going to venture a guess and say A. diadema. The problem with a lot of acaras is that they don't really show good color untill they're close to full size from my experience. If it colors up more yellow then it's A. metae , but my moneys on A. diadema. Cool acara whichever one it is.