Fixation of 26d Lineus 

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I had an egg mass with many worms. I tried relaxing for 20 min and they were not contracted, but also not fully extended. I then did a 2min 2% cystein wash followed by a FSW wash to remove the cystein. Worms started to move again, so I re-added MgCl2 and waited 5 min. After adding the fixative they contracted and became small balls :/