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Fixing ~50 gastrula stage embryos of a egg mass from the left aquarium, the one with the green Lineus (+pink eyed nemertines). Egg mass looks clearer and with fewer eggs per case (1-3, previous Lineus red had ~9 embryos per case). Fixation protocol for in situ.

I have also cleaned the 3 Lineus longissimus dishes many times. Tomorrow I start putting them in RNALater.