Board Thread:Questions and Answers/@comment-36060759-20190306184010/@comment-38532157-20190307144844

If you go to the underwater islands, there are 3 or 4 fragments there and the only noteable threats are Bone Sharks. Look for a large wreck on a large island there.

AND it has a large concentration of rubies... gel sacks? You can plant them. Farm them, it's a lot easier. hit them 3x with your knife to get 3 spores.