My Delhezi looks awfully bloated. I'm not sure if it's an infection of some sort or just because hes a pig. Any help would be appreciated... The pics attatched are a blurry one from when I first bought him, showing a normal Bichir shape, and the second one is the best picture I have of him to show how bloated he is. The lump in his belly starts right after the head and goes to almost the pelvic fins, then he tapers out into the tail.
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Pics:

