I am wanting to differentiate sensory and motor neurons in a developing zebrafish and am wondering if there is a marker that I could use to do this with?
This aspect has been discussed on RG, you should find the info here https://www.researchgate.net/post/Is_there_a_specific_immunohistochemical_marker_for_motor_sensory_fibers_in_peripheral_nerves/1
This is not my field but it would seem to depend on just where you were looking. A quick browse turned up many references, here is just a small sample of what I found:
http://www.ncbi.nlm.nih.gov/pubmed/21743158
http://www.neurologyindia.com/article.asp?issn=0028-3886;year=2011;volume=59;issue=3;spage=333;epage=338;aulast=Meng (same as above but more complete)