eli5: Does the salt water of the Oceans make aquatic Sealife less susceptible to infection?
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No. Salt water can be an effective antiseptic against *some* types of bacteria, but the ocean isn’t really salty enough to have any meaningful antiseptic effect, and the ocean is absolutely teaming with bacteria, viruses, fungi, and other organisms that can infect marine life and even land-based life such as humans. Humans can catch some really nasty infections from ocean water, and there are a number of diseases that are occur in both humans and marine mammals and can be transmitted between us.
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