Here’s a nice image– after developing through the evening in our incubators, a much higher proportion of embryos have survived! You can clearly see many little spinal cords in our petri dishes now. Here is a close-up of what we are seeing…

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A Brienomyrus brachysitus larva has completed gastrulation– the basic body plan of the fish is now visible, with the head clearly visible at the arrow. Spontaneous movement is already occurring.