For those of you who were SPS reefers in the mid 00s, there was talk about a particular species of SPS coral (from Fiji) that always succumbed to RTN in any tank. Hence, it's nickname of "RTN King"!
Here's a photo of it in one of the reefer's (scarab) old tank (see below) - it's the whitish one behind the purple valida. Anyone knows what species it is?