More on fish anatomy.
Waterstrat
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D000818:Animals; D017756:Aquaculture; D005393:Fish Diseases / Q000209:etiology* / Q000517:prevention & control; D005399:Fishes / Q000033:anatomy & histology* / Q000469:parasitology; D010272:Parasitic Diseases / Q000209:etiology / Q000517:prevention & control; D010273:Parasitic Diseases, Animal; D012867:Skin / Q000033:anatomy & histology / Q000469:parasitology