You missed my point. My point was that myths do not need dates to line up in order to prove or disprove their original source was factual. Myths are not science. They merely point the way to something. Such as the myth of King Arthur pointing to a real man. Maybe your definition and understanding of myths are different than mine.
Myths need hard evidence to prove that they started off as an actual vent. Atlantis, for instance, is supported by many myths in many different cultures, but it does not mean if it was true.
Statistically speaking, it would be odd if so many cultures had such similar flood stories if the stories hadn't originated from a common source.
In modern times yes, but the spread of information was slow due to high travel times and was often stopped by areas which with current technology were impassable, like an ocean or a large desert.
Any culture can have flood stories----it's the nature of the flood stories that we are discussing, not the fact that there are flood stories.
Places flood. Its a fact of life. The presences of flood stories does not prove or even hint at a massive global flood.
I've already explained the water part. Here's a good article I found answering your questions about the fish:
Institute for Creation Research - A Christ-Focused Creation Ministry
Wow, such an impeccable and obviously unbiased source, but if I must...
1. Their salinity argument is "Salmon and other fish move from salt to freshwater, so the other fish can adapt". Sorry, but this does not explain the presence of fish who are very sensitive to the water's salinity content.
2. Their temperature argument is "Fish can take a large variety of temperatures" Yep, for a short period of time. Its why you don't see tropical fish taking vacations in the south pole.
3. turbitdity "Some species of fish can survive being heavily coated with dust" Bully for those species. It does not account for the presence of fish who are very sensitive.
4. "It is possible for massive fresh water floods to for a blanket of fresh water of salt water." This would kill more fish then it helped. The fish in the freshwater blanket would have little to no food and be unable to dive to get some. Also, the presence of a massive flood of freshwater is broken because the fresh water would drag mega-tons of dirt into the ocean, raising its salinity massively.
5. This Mt. St. Helen's argument is idiotic and contradictory to the extreme. THey acknowledge that the local fish died out, and the fish are not back. Why are there so many unique species of fish then?