Two books I highly recommend are:
Fish Disease: Diagnosis and Treatment by Dr. Edward J Noga.
Captive Seawater Fishes: Science and Technology by Dr. Stephen Spotte
While not the easiest reading, they are both superb.
Both books are somewhat expensive but are well worth the money.
Use Google Scholar for marine biology papers on disease treatment.
Fish Disease: Diagnosis and Treatment by Dr. Edward J Noga.
Captive Seawater Fishes: Science and Technology by Dr. Stephen Spotte
While not the easiest reading, they are both superb.
Both books are somewhat expensive but are well worth the money.
Use Google Scholar for marine biology papers on disease treatment.