Why is it called a reef?

Could you please explain to me the reasoning behind the terminology "reef" when referring to this particular entity? I'm curious to understand the context and significance behind this choice of name. It seems an intriguing and perhaps unconventional designation, and I'm eager to gain a deeper understanding of its origin and meaning. Perhaps it's related to the structure or formation of this entity, or maybe it's a nod to a shared characteristic with a different, more familiar reef? I'm looking forward to hearing your insights.