Hey everyone, I’m new here and my betta Picasso has been looking very unhealthy. He used to be very active and now just sits at the bottom of his tank. He still eats fine, and the water seems fine too (no problems with pH or ammonia), but he has these marks on his sides that he did not previously have. Can anyone identify what he has? It would be greatly appreciated (sorry if the pictures are upside down or sideways)