Six lines with other wrasses units large tanks is risky enough but in small tanks it’s very unlikely to work.
I had my sixline in with a half dozen other fish (including cleaner and leopard wrasses) in a 25-gallon and it was absolutely fine. YMMV of course - maybe I won the wrasse lottery on my sixline...
Definitely not a sixline wrasse. Six line wrasse is of the genus of wrasse that should not be mixed with other wrasses. I don't remember where I saw it or when but I read this great write up about all thing wrasses from compatibility to collecting in the wild to you name it. In that article it was said by any expert in wrasses that the genus Pseudocheilinus should never ever be mixed with other wrasses of any genus including of the same. Well just so happens that the 6line is of that genus.
The countless amount of second hand stories is where it came from.
Although I’ve never had a bad sixline (In the smaller to the medium sized tanks, they have been perfect for me). I have certainly heard a ton of first hand and second hand stories of these guys being monsters.
They're typically very territorial. It's often not just with other wrasses, but sometimes even with just other fish with a similar shape or that occupy a similar niche. In terms of why, I suspect it's most likely due to the fact that they are not haremic and tend to live more solitarily than most species of smaller wrasse commonly kept. (Although that's just speculative based on their behavior)
Same here my 6 line digs his 4 wrasse friends in my tank. Elite pest hunter and model citizen.
+1 to this - I missed the flasher wrasse part.
