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  1. Danio has a concave stomach!

    Cyprinids and Atherinids
    So I have four danios of the glofish type. My orange one has always had a very round stomach and then today we just noticed that it is concave. There is a dent in it's stomach and if you look beneath the fish, you can see a darker spot in the dent. I am not sure what happend...the fish is not...