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The first two are birds nest, Seriatopora, not sure which one. The gorgonian, or sea whip is a filter feeder. I have heard of varieties that survive with light alone, but I don't think that's one of them.
I'm pretty sure #3 is a purple candelabra. They are a photosynthetic type of gorgonian and will live under good lights, but will thrive if fed phyto. The first two pictures are species of birdsnest corals. Seriatopora spp.