RNAi knockdown in nauplii of genes involved in iron or heme uptake, transport, storage or homeostasis, and with elevated expression from the parasitic copepodid stage. Infection of fish with knockdown copepodids (3 fish with 80 lice) and lice count after 16 and 42 days. No significant difference in number of lice on fish at termination. qPCR validation not done yet.