MrDS: which do you have, the African, Australian, or the South American? I'm guessing the african, and definitely not the SA.
The african is on the top of the chain, then the aussie, then the SA. The aussie will live in waters that don't dry up, but will use their lungs in more stagnant water. Aussies are the closest relative to their prehistoric ancestors. The South American, however, relies on air alone, not being able to extract oxygen from water.
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