If I'm not going to use them that day I put them alive in a zip lock bag with water and salt and drop them in the freezer with the bag flattened out so they freeze fast. This way they keep their color longer and are easy to thaw out. Mine will last about 2 weeks this way before they lose color.
They look fresh caught when thawed out. Use them quick and don't re-freeze.
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."
Then He made the earth round...and He laughed and laughed and laughed!