Those (FISH) that survived must have had inherent abilities to quickly adapt to rapid changes in salt concentration, among other factors. Millennia have elapsed since the flood, and since genetic robustness diminishes with time, it is likely that many fish that today have narrow salinity tolerances came from ancestors that had broader potential in that area..
This theory require a rapid speciation that even Darwin could not dream of. Yet no evidence to back this up in DNA or genetic studies. At least evolution postulate "junk DNA", not stories about fish in restaurants.
Forget the salt. Young Earthers promote rapid and massive movements of the continents. Yet that much seafloor volcanic activity would have poached the salmon.
==This theory require a rapid speciation that even Darwin could not dream of. Yet no evidence to back this up in DNA or genetic studies. At least evolution postulate “junk DNA”, not stories about fish in restaurants.
The reason Darwin could not dream of such rapid adaptation and speciation is because he put on the materialist straightjacket of random changes plus natural selection. We now know, via the “new biology” (which includes the field of epigenetics), that many organism have the capacity to adapt on-the-fly. From a creationist perspective, this means that God frontloaded his creatures with the capacity to adapt to a variety of environmental conditions.
==At least evolution postulate “junk DNA”
Which, along with Darwin’s so-called Tree of Life, is on the way out the scientific window.