I had a Texas with a Black Shark and plecos since they were 2 inches. In the first two years there was never a single mark on any of the plecos or Black Shark(even though the Texas would chase the Shark(which was 13inches)). Woke up one morning and the Black Shark was all beat to hell(and dead)...within a few short weeks later the 15 inch pleco was dead(also beat to hell).ever had one long anuff to know how they behave or truly act if not you are also talking out your butt just saying.
As the other poster said...it is not the norm for a peaceful Texas