Micro is right that Steelhead are Oncorhynchus mykiss but which is the same clasification as Rainbow trout.

Here are a couple of links that will show you that the Rainbow trout is and O. Mykiss
http://policy.nrcs.usda.gov/scripts/lpsiis.dll/TN/TN_b_10.htm
http://www.niwa.cri.nz/rc/freshwater/fishatlas/species/rainbow_trout.htm
http://www.intl-pag.com/10/abstracts/PAGX_P624.html


So the WDFW people did tell you right they were taken from Salmo to Oncorhynchus but the question you need to ask is what is a rainbow trout classified as?

If I miss spoke someone more verse in Biology please correct me.

JJ