I'm no expert but it dosn't look like markings in the pic.
I would check tonight if there also swelling underneath with the blackness.
Maybe also do a thread in tropical discussion with the pic. To see if it is markings.
Thanks zoddyzod.
Your pic does look like markings. But the posters dosn't to me.
Thanks zoddyzod for the picture. Actually i have the bolivian ram as well in my tank and understand what you mean by markings. But i'm pretty certain it's not those markings i'm seeing on the apisto. It seems like as if something is in its stomach which is looking like a big black mark when we see in the light. Here is the video of the apisto when i got him and no clear visible mark in the stomach
Thanks