I love my CBS, he is aggresive but most everything else does fine to stay away. I had a sally lightfoot also until he dies geeting very big, both left my fish alone, the only time the CBS touched my fish is when the fish mistake him for a cleaner( I lost a cleaner, noticed all the fish surrounding the CBS and had to emediately replace the cleaner so they would go to the right shrimp), now all is fine. Peppermint shrimp don't stand a chance in my tank, but don't have enough proof that it is soly due to the CBS attacks. But he is the coolest shrimp, besides what the cleaner does, I will always have one!