neuronal development of zebrafish

[Catherine Glynn]

I am a PhD student working with Dr. Lucy Byrnes at the National
University of Ireland, Galway, Ireland. I am interested in the
neuronal development of zebrafish. I am trying to determine an 
ideal Neuronal Marker in zebrafish. I thus need to find a
gene that first appears at the end of the gastrulation period when 
the first signs of the nervous system appear. Can anyone help? 

Thanks
Catherine