This FRT is following the trend of his species and turning into somewhat of a bully. I really need the 500 up and running so he stops trying to hide with the pim cats in the small space of the 150.
In the second picture below you can see him sniffing at the broken barbel of my marbled pim catfish. I am assuming the turtle is the one who bit off the end of the barbel. Luckily they grow back within days.