Is there something wrong with this scallop residue?
Comments in this blog comment could offer a clue to the blue color. The most relevant part says:


  The blue color in the liquid is due to a change in the natural
  chemical composition of the scallop meat during spawning.


That doesn't explain the hard white stuff, but maybe it'll put you on the right track. If there's a state or university agricultural extension near you, they might be able to shed some more light on the mystery.