No problem. With the shark it really varies a lot as to when they start to become less sociable- when i got mine i adopted it of a friend and it had already become quite territorial at about 3-4inches long. But with other people have heard their RTBS getting territorial at 5inches or even 2icnhes long- so it really varies a lot, RTBS's individual personalities can vary a great deal. While not all RTBS become territorial towards other fish, most do at some point- the level of aggression can vary massively though, some will go for pretty much every fish in the tank, while others will only target fish which have similar coloring or patterning to the RTBS, or will only target slow moving fish or fish which like the same space/habitat in the tank as what the RTBS likes etc.
So basically just keep an eye on it, chances are it will become territorial to a certain extent as it grows, however it might not be too bad, however if it does start to become quite aggressive you should be prepared to rehome the shark or get it its own tank ASAP.
Brilliant thanks!!
Cool thnaks the fish will probably be updated before the tank as i rent and have space problems!! In time, in time!! I will try the swap section but i am in Dublin so i am probably less like to succeed and this forum is predominanty British it seems. No harm though i will find a way. thanks again foa ll your help, much apprechiated
