Actin filaments accumulated in the nucleus remain in the vicinity of condensing chromosomes in the zebrafish early embryo. https://journals.biologists.com/bio/article/12/5/bio059783/310414/Actin-filaments-accumulated-in-the-nucleus-remain
Fluorochrome-labeled #Morpholino used as a diagnostic probe in a zebrafish to visualize transcription of the miRNA mir-430