Fish Soy
Thai fish soy sauce. A good substitute is “Sambal Blacan” mixed with light soy sauce. Use sparingly.
Ginger
Use only fresh root ginger; never substitute powdered ginger as the flavor is quite different.
Silver Fish
Tiny salted and dried anchovies or whitebait, sometimes sold as “silver fish”. Useless using the very small thin variety not more than 2.5cm (1 in)long, discard the heads and dark intestinal tract.