WE call those RTSN's....lol and the marbled cat RTC hybrids...MRTC's. OK I call them that.... but it's catching on.
Anyway they can be great fish....get HUGE and grow quickly. I have an RTC and a MRTC but from what I've seen here on MFK there seems to be two basic types of RTSN's
Some more closely resemble the RTC in body shape while others look more like the TSN.
As with any big cat however your looking at....Huge responsability...Huge appitite....Massive housing requirments.... countered with HUGE personality...