Data and Publications - Registry of Aquatic Pathology View Record Accession number: 332 Host species (latin): Oncorhynchus mykiss Common name: Trout, Rainbow Freshwater Disease/condition: Chemical toxicity due to overtreatment with malachite green (possibility of formalin). Location (host): Gills Aetiology: Toxicity Aetiology: Toxicity Additional Information: Significance: Mortalities encountered on site. Lession: Gill epithelium of second lamellae separated. Stains: Location: Trout Farm location Area: Devon Country: UK Submitter: E.B. Hudson Accession date: 9/28/1983 Images: Working for a sustainable blue future