User blog comment:Captain Dashing/Isn't is funny?/@comment-4898132-20111101215136

This is just my view on why is that but I believe the "JS mermaids" and the "OST mermaids" are 2 different society of mermaids.

So sometime after Jack had peace with the JS mermaids, Jack had something with Marina, which made the OST mermaids be not fortunate of him. Either that or the OST mermaids are a more vicious mermaid breed...and Jack's experiences with Marina happened somewhere far from Marina's kind.