Which corals are the ones that wave with the water current LPS?
The corals that wave most with the water current are soft corals (Xenia, Colt, etc.). LPS
include Hammer, Torch, Frogspawn, Bubble Corals, Fox coral. Torch & Candy cane, etc.
are mainly the Acroporas, Montiporas, Bird's Nest, etc. etc.
corals can be aggressive?
Extremely so. They battle for territory by excreting toxins, stinging each-other, etc. I've got a pic of a Green Acro and a Orange Monti battling in my tank - give me a sec to find it....
Also - a lot of softies, mushrooms, and polyps are notorious for chemical/toxic "warfare". These can be some of the worst.