Crawfish

I have been called on the rug! I actually got phone calls reprimanding me for spelling the word crawfish...crayfish! I was told being from the South, the only way to spell this crustacean is "crawfish". They were actually embarrassed for me. I have now done some research and found that anything goes.
The name "crayfish" comes from the Old French word escrevisse (Modern French écrevisse) from Old Frankish *krebitja (cf. crab), from the same root as crawl. The word has been modified to "crayfish" by association with "fish" (folk etymology). The largely American variant "crawfish" is similarly derived.
Some kinds of crayfish are known locally as lobsters, crawdads, mudbugs and yabbies. In the Eastern United States, "crayfish" is more common in the north, while "crawdad" is heard more in central and western regions, and "crawfish" further south, although there are considerable overlaps.
The only thing I know for sure is that no matter how the word is spelled, they taste great!