Just want to point out the 'Blue Texas' is used to refer to both the 'Texas' (Herichthys cyanoguttatum) and the 'Green Texas' (Herichthys carpintis), and hence why sometimes 'Green Texas' is blue. In fact, the 'Green Texas' can change their color between blue and green at will. Some may go their entire life not changing their colors, but others would change their colors rapidly. Because of this some people buy a 'Green Texas' as a 'Blue Texas' because at that time the 'Green Texas' is blue, and then later on it decides to become green one day and well, is not a 'Blue Texas' anymore. Since 'Blue Texas' also refers to the 'Texas' as some strains are blue-ish, yeah... 'Blue Texas' really shouldn't be used as any sort of designation. Stick to 'Texas' and 'Green Texas' or use the scientific names (referring to them as Cyano or Carp is enough) and there'd be so much less confusion.