Fig. 12-24. Starfish frequently feed on clams. In the top picture the starfish is huddled over the clam. In the bot- 

 tom picture the starfish has been turned up on one side. Note the long tube feet attached to the two valves of 

 the clam. Their continued pull eventually weakens the clam so that it gapes open, allowing the starfish to con- 

 sume its soft body. 



