Growth on rocks.

Discussion in 'ID This!' started by JHiestand, Jan 5, 2012.

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  1. JHiestand

    JHiestand Spanish Shawl Nudibranch

    Joined:
    Sep 19, 2011
    Messages:
    78
    Hey everyone,
    Just noticed some small white things growing on the rocks. Here is a pic of them, they seem to sway in the current and are slowly getting bigger. Any ideas?

    Thanks
    John


    [​IMG]
     
    JHiestand, Jan 5, 2012
    JHiestand, Jan 5, 2012
    #1

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  2. norg.

    norg. Kole Tang

    Joined:
    Aug 25, 2009
    Messages:
    1,766
    Location:
    Muskego WI
    It is a pineapple sponge. A harmless filter feeder.
     
    norg., Jan 5, 2012
    norg., Jan 5, 2012
    #2