Yes, regani stay small 3-4". It could be a belly crawler. It is small and stressed so hard to say. If it is regani the ventral portion will be a smoother gray and the bars will only be on the dorsal portion of the fish once it settles in. With the spot on the operculum, you might be right. It also looks a little heavier bodied then regani. The more I look at it your probably right. At the very least I am more convince I was wrong. Regardless you are in for a good time with that fish.