i just did a google image search and those were the first ones to come up.
the HA pic is actually on the about.com website in their saltwater section..
if you read the article, its a pic of HA dieing off. the bubbles are from gasses that are released as its dieing.
Quote:
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Steven Boss sent us this photo of some of the Green Hair Algae which was growing rampantly in his tank. The trapped bubbles you see are caused by gasses being released from the algae as it decomposes. This is usually a sign the algae is starting to die off.
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still prolly not the best photo