It is a plain ol crawdad.
a crawdad and a crayfish are the same thing as far as I know.
I like them, but to think of eating them, makes me think of eating a giant roach. He has a crunchy shell. ICKY
Sort of like the roach of the sea...

(you can tell I spend way too much time watching tot videos lol)
Anyway, they molt.
They will get around 5 inches max, at least that is the biggest one Ive caught at the creek, they like cool water.
worms, shrimp pellets, minnows, maybe insects. ect
probably snails?
They are also masters at escape. He will be under your foot at 2 in the morning real soon if you dont trap him tight.
They LOVE rocks, to hide. Gravel. They will move the gravel around into piles and make dens ect. VERY interesting to watch them work. Will uproot pants ect and rearrange their house to their liking no matter what
you want!
They can also pinch you with those claw thingies.