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Early parhypural development in Danio. Lateral view of caudal region of Danio rerio (3.4 mm SL). Collagen II (green) and DAPI (blue) stain. Anterior left, dorsal up, axis inclined CCW about 45 degrees. Act, actinotrichia; MCN, mesenchyme cell nuclei; Nc, notochord; Ph, parhypural.
