[Stefan-A]

Originally Posted by Zephyr

Members of the cyprinid family are more fatty, oily fish, including carp, goldfish, minnows, etc.
Surprisingly, danios and white clouds are in this family.

Cyprinid fish are indeed the worst sources of thiaminase. I used to feed certain species to my snakes, but I stopped the second I read that fish belonging to this family were loaded with the enzyme.