It's funny because they are really loners in the tank doing their thing hunting pests but then they develop an attachment to youHad a six line wrasse years back that always greeted me soon as I walked up to the tank. All fins would flutter and he would raise his dorsal up and down in excitement. Always like he was happy I returned. He had lots of personality and it was really enjoyable to watch him patrol through his aqua scape. Whenever I added something new, like a coral, he would look it over for a while, either in awe of its beauty like me or perhaps searching it for a possible meal.