Recently, I noticed that my arowana’s lower jaw is slightly swollen. It wasn’t like that a few days ago. May I know what’s wrong with it? Could it be something that is lodged in its mouth? It’s still has a huge appetite despite this. The first two pics were taken on Monday when it still looked alright. The last two pics were taken two days ago when I noticed the bulge beneath the lower jaw. The part that I’m referring to is the soft tissue below the lower jaw. The right side of that part appears to be more swollen/bigger than the left side
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