clam that looks like a rock?

[windowlicker]

i not long posted a thread about a red worm with long bright red tenticles to which i didnt get any replies so i have been watching it very closely.

i have noticed that the worm seems to rub its tentacles on what appears to look like a two white to translucent bubbles that comes out the rock and gets bigger then disappears.
however today i noticed that where the bubbles (so to speak) come out the rock is actually some sort of clam as what i thought was a rock closed up :eek1: and today have seen it open and close several times and when open you can see the bubbles slowly getting bigger if that makes sense lol.

i will try and get a pic but my camera is only a cheapy

 

[windowlicker]

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