We call them crayfish but most people seem to know them as rock lobster.
Wow, those are impressive.
When I visited Down Under in the 80s, everyone called them "bugs".
Growing up in MI and OH, we called the fresh water versions, "crayfish".
My friends from Louisiana insist they are "crawfish". The freshwater ones.
Nothing is quite as impressive as the big saltwater lobsters with claws
that come from the NE Atlantic. The New England Aquarium in Boston
displayed some giant specimen that must have been over 30#, a record at
the time.
When I lived in San Diego, you were allowed to legally catch something like
one per season, over a certain size, and no SCUBA equipment was allowed.
You did it with bare hands and used your dive knife as a guage. Those, of
course, were "spiny lobsters", and could not pinch you.