I don't use any of those crustaceans.
But you have to think a little bit for yourself before you take other people's suggestions.

1. Steelies are free swimming fish in open water. They don't hide in rocks like Lings or sift gravel to search for food like Gobies.

2. Sand Shrimp got their name because they live in sand and mud.

3. Prawns do not live in sand/mud tunnels. Some are free floating and some just crawl on the bottom.

Draw your own conclusion when you ask yourself, "How can a Steelhead or salmon dig out the sandshrimp from the sandy/muddy bottom?"

Good Luck.
_________________________
Know fish or no fish.