The Gastrointestinal Tract of Fish - Aquaculture Nutrition: Gut Health, Probiotics and Prebiotics - page 8

Fig. 1.7 Scanning electron microscopy images from the posterior intestine of rainbow trout
Oncorhynchus mykiss , depicting the mucosal folds (or 'villi'). Scale bars = 50 μ m. (Source: Merrifield and
Dimitroglou, unpublished.)