Hi. I have seven Oscars in a 150, just them, plus 2 plecos. Has anyone noticed their Oscars swimming upside down?? Mine do that. I have five that are still relatively babies and they swim single file the length of the tank and at the end they go up and then swim for a distance upside down... it is the craziest thing. They are very healthy so I know it is not that they are dying... I think they just like to do it. They seem to be playing.
Never seen any of my oscars swim upside down. Seen them flash off things now and then though. That's the closest to upside down i've seen.
Gavin, In the hobby since 1993, Cichlids since 2005. 500l Oscar, Severum, Acara, Temporalis and Psittacus with mollys, L#'s and Pictus. 200l Fahaka Puffer 65l Pygmy puffers, Khulis, Clown garras. 65l Baileyi Puffer