A mystery ship

Legend tells of infamous ship that stalks the oceans The mane six have to track down and stop a major threat before it's too late

In the dark waters surrounding Equestria and other nations something is stalking unwary ships and seemingly taking without a trace. A ship of horror, A vessel of the night. Might there be something different about this crew if so can Twilight and her Friends find it and put a stop to it or will it take them too.
^^^^ this is the Young Atlantic