Poloniex is cleaning there exchange, and that is nothing more then normal.
   They want to make money, so coins that not make profit will be removed.
   Clam is not profitable anymore, every coin cost money to keep it running "man hours"
   And the money they make with the fee of trading Clam is minimum.
   So they update there websites with new coins, and the not profitable they will delete.

1  Poloniex                   CLAM/BTC   $28,141   $2.01       71.78%   support left 13.8  Btc
2  Bittrex Bittrex           CLAM/BTC   $9,861   $1.55       25.15%  support left   8.9  Btc
3  Cryptopia Cryptopia   CLAM/BTC   $669           $1.58         1.71%   support left   0.4  Btc
4  Bitsane Bitsane           CLAM/BTC   $531           $2.15         1.35%   support left    ? almost nothing
5  YoBit YoBit           CLAM/BTC   $0           $1.98         0.00%   support left    ? almost nothing


  price on poloniex has bin pumped up 10 to 20 % but don't be stupid to fall for this stuff
  they will sell your walls and thank you for you to expensive buys.

  Clam had already a long way moving down, so the candle is slowly going out i think.
  Sad this coin has no potential anymore,

 gr bas