Dear All,
I visisted batam a couple of months ago. They were selling this kinda clams (kept as pets) at a seafood restaurant for food!
All the clams i saw were huge, prob abt 12-15inches. Going at only abt $40. Some were green, most were bluish.
Maybe u guys can go to the restaurant n tapao put into ur aqaurium
I went to 'poke' the clam lightly, and it squirts water out man! haha