Ralph, the store is Penn Dutch. There are only 2 of them, both near me. Margate and Hollywood. It does say frozen and it is in a cry-o-vac, so I will check it out.
Greg, tiger prawns are amazing. They are also expensive. The same store above has them for $12.99 lb. but not nearly as big as Great Alaska. They are good...like lobster. For me though, $30/lb for anything is pretty steep. 2-3 / lb must be huge.