The symbol on the coat of arms is indeed St. George slaying the dragon. It's an important and potent symbol that has reappeared throughout history, and people often misinterpret it.

I'll spare you the long-form essay, but in this context, we're dealing with the dragon and Christianity. Dragons, snakes, and other similar reptiles are symbols of paganism. St. George slays the dragon by converting pagan peoples there to Christianity. St. Patrick drives the snakes from Ireland by converting the pagans to Christianity.

It is an older symbol than that, which is why we see snakes and dragons as symbols in China, in Greece, ancient Egypt, and other societies as well. Here, the discussion is a bit more nuanced because there are variations on a theme, but the short version is that the dragon is a symbol of power and wisdom in various ways. This alone should present a very interesting contrast to the Christian use of the symbol.

When people talk about "reptilians," they're talking about really old families with deep roots that go back to the original understanding of the symbol. You'll hear this referring to "they" or the "powers that be" who actually hold most of the power in this world and make most of the truly consequential decisions that shape our world. There are those who respect them as symbols of power and wisdom, and those who hate them. When Queen Elizabeth II died recently, we heard a lot of use of this symbol in this context.