Traditional Chinese medicine warm of eating fish with no scale (无鳞鱼). In particular, herbs like 荆芥 (Fineleaf Schizonepeta Herb) used for flu, lasting boils and blisters, are contraindicated with non scaly fish. Other herbs similarly cautioned include, 白豆蔻 (Amomum cardamomum) and 何首乌 (Fallopia multiflora, Thunb.).
Some doctors warn against taking non-scaly fish when using Chinese medicine, in general.
Non-scaly fish is slimy. If handling fish gets you a virus infection, wear gloves. No big deal.
Just fish slime in a petri dish.
