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What’s the largest diatom you’ve ever seen? I got 1.843 mm (today on #Twitch). Not a typo; I meant millimeters.
I believe it is Thalassiothrix - the close up is what both valve ends looked like.
@pacificplankton
#diatoms #Thalassiothrix #SanFranciscoBay #SEM #TwitchStreamer