- Mar 20, 2020
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hi I’m not sure about lifespan but I have had them over a year. they act like fresh water fish but eat aggressively. I would put more but it takes work. I have never made salt to fresh but I know of sharks living in freshwater as they have acclimated over time. ThxWhen you acclimate them to SW doesn't that make there life spans shorter also can you make SW fish into FW?