Symbiotic Invert List?

[Tihsho]

I've not stumbled upon any threads that list symbiotic relationships within inverts. I just realized how I've got a couple going on already and was looking to add more if possible.

So far what I can think of are the following:

- Pistol Shrimp w/ Goby
- Sexy Shrimp w/ Anemone (or LPS if there are no Anemones in the tank)
- Anemone Shrimp ... speaks for itself
- Porcelain Crab w/ Anemone
- Acropora Crab ... speaks for itself
- Peanut Worm w/ Heteropsammia Cochlea (A.K.A. Walking Dendro)
- Spirobranchus (Xmas Worms) w/ Encrusting corals
- Paguritta Corallicola (Right Handed Hermit Crab) w/ Astreopora
- Long Spine Urchin w/ Bangai Cardinals

What am I missing?

 

[Tihsho]

Forgot to include the most simplistic one on the list:

Skunk Cleaner w/ various species of fish

 

[Jacked Reefer]

Pom Pom crab with its small anemones.
Edit: Acropora crabs also host pocilapora

 

[flsalty]

Dardanus pedunculatus, the anemone hermit crab

Arrow crab and Condylactis

Bisma worms and usually Porites