Six line wrasse chasing cleaner wrasse

[Boz]

Hi, I have both fish for few mth, but five days ago six line wrasse started to chase cleaner wrasse! All day long! What's happened? And what can be done?Thanks

 

[Sniperhank]

Basically both fish are now trying to set up boundaries in your tank. Problem is, wrasses don't get along with fish that look like them unless there is ample room. Putting wrasse in a smaller tank even of the same species or even mated up can be an issue at times from what I have heard.