After my roomie and I did extensive research last night, there is a difference between the colloquial and precise usage of crayfish and lobsters.
Precise usage: Crayfish only live in fresh and brackish waters. Lobsters only live in brackish and marine waters.
There are differences between the crayfish as well: those from North America and Northern Eurasia are approximately the same morphologically, while the Southern Hemisphere contingent are quite different from these.
This could have been the source of the confusion, but hopefully that will be resolved, thanks to Joe, the roommate with free time and desire to learn yesterday.
Precise usage: Crayfish only live in fresh and brackish waters. Lobsters only live in brackish and marine waters.
There are differences between the crayfish as well: those from North America and Northern Eurasia are approximately the same morphologically, while the Southern Hemisphere contingent are quite different from these.
This could have been the source of the confusion, but hopefully that will be resolved, thanks to Joe, the roommate with free time and desire to learn yesterday.