I do have to say that one is really close, especially the way it looks standing on coralYeah, for anyone curious, the best I've been able to do is narrow these spiders down to two families - the Nymphonidae family or the Callipallenidae family.
For an example of a species that looks relatively similar to the one's Reefkeepers Archive has:
Nymphon grossipes Nymphon grossipes
Nymphon grossipes is commonly referred to as Nymphon grossipes. Difficulty in the aquarium: Not suitable for aquarium keeping. Toxicity: Toxic hazard unknown.www.reeflex.net