The regional differences throughout the U.S. include "crawdad" and "mudbug." The Associated Press handbook entry has it as "crawfish," then specifically says "not crayfish."
"Crayfish" is what you can get, by the pound, at $13 a pound, according to The New York Post, at The Boil, a Louisiana-style seafood joint in New York City. The restaurant's menu, however, correctly calls it crawfish. It even says "crawfish" on the front door.
Nevertheless, The Post took a look at the crayfish restaurant, which recreates for New York diners a picnic-table-style seafood boil with Abita beer on tap - and where diners order from iPhones or iPads while wearing blue gloves.
The gloves have, in fact, turned out to be one of the restaurant’s most popular features for urbanites who want to keep their manicures clean while they munch.
It's also cash only, so if they're going for authentic New Orleans they've nailed the bill portion of the meal.
The Boil's Yelp! reviews sound good - though one disgruntled rEaL nEw OrLeAnS person who has never been to the restaurant gave it one star because of what they read in The Post - the nation's saving grace of journalism, The New York Post - and called the diners a "bunch of pussies."
Next time I'm in New York, I will happily don the blue gloves and dive into a bucket of crayfish.