Yes, there's a small sea slug that eats them. I've had some in my nano. If I see any, I'll ship you a couple. They're small orange-red nudibranch-like, only a few millimeters long.
Here's a pic that I took.
an Ornate Leopard Wrasse will clean that up for you in no time. They feed on them in the wild and I have successfully used them in two different tanks.
I only have experience with Ornate Leopards, but I assume similar wrasses will do. They all have grinding teeth in their lower jaw to crush foraminiferans, spirobids, etc. They will eradicate small snails and ostracods as well.
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