Hi my 10 inch silver arowana seems to swim well when i used to feed him.But when from a distance or from a side angle when the aro comes near the wall of the tank (near the glass wall) it seems like its swimming in a crumpled way or the body seems to be uneven .. is therre any thing wrong with aro or its a common behaviour?

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What's the tank size and water parameters, ammonia, nitrite, nitrate, temp?

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