Hi SW. A point that might be useful for goal 8.

When I clicked on the link in step 1 to get a cursed reef it actually took me to my inventory where I found I had 2! A nice surprise
I am guessing that maybe for those of us still working through other steps before starting this goal line, that there must be more opportunities for these to drop before getting to this stage.

I also have purple coral and have not yet got to goal 9.