You mentioning about crab makes me want to have crab cakes. I would like to go to Red Lobster and get some good seafood. Was that 100-pound crawfish a handful to catch.
Obviously, you have never even seen crawfish, Profit5500. Allow me to enlighten you about these interesting crustaceans.
Firstly, a crawfish (technically a crayfish) is not in any way a fish. It is a small crustacean about 3-4 inches long, with the largest ones being under 6 inches. They can live in water, but many of the crawfish species also live in mud bogs, thus giving them the nickname of " Mud-bug".
Therefore, the possibility of catching a "100-pound crawfish" is totally non-existent !
Crawfish look very similar to a lobster, just a whole lot smaller; plus they are a fresh-water species, where a lobster is a salt-water species.
The crawfish I used to see would hide under rocks in streams, and you could just grab them. However, in the south, where there are actually farmed crawfish; they usually catch them with traps, similar to catching crabs.
Here is a picture that shows the size of a crawfish.