Hi cutie

I love your tank, I don't know too much about saltwater though, i've always done cheap freshwater fish. I like all fish :). I was wondering about the corals though, how is their behaviour? Do they behave like plants? I really want to make a rainbow coloured salt water tank, I saw one once that had every color of fish and coral, it was soo nice to look at. The fish I saw were all the same kind, but they came in pinks,yellow,blue,purple,brown,black,green,etc. Looked almost like a tang without the pointy nose, any idea what that could be? Your videos really inspired me to add some corals to my tank, I have about 40-50 koi in a 80 gallon tank, I am gonna move them to an outdoor pond and start a salt water tank, wish me luck :)