I don't understand this phrase "beginning with its development". What does that mean? I think "beginning with" does not mean as it normally means, which is " start with someone or something; to have someone or something be the first in a series."
The skin of the zebra fish is transparent for its first few days of life, beginning with its development in a clear egg, so the egg can be placed under a microscope, and the growth of the entire nervous system can be viewed in real time.
I suppose just "begins" seems much more plausible. ("begins its development")