i.d help crab

[marklugo23]

so lately my sps has not been doing good at all, and my levels are spot on
alk-9.3
cal-450
mag-1350
salinity 1.025

i dont feed heavy and i use ro water so i know my phos and nitrates are down.

i found this crab eating on the sand bed next to a rock with a bunch of holes, i took out the rock and sadly the crab died on extraction.

would this be a sps eating crab or any type of coral eating crab

 

[SanmanReefer]

so lately my sps has not been doing good at all, and my levels are spot on
alk-9.3
cal-450
mag-1350
salinity 1.025

i dont feed heavy and i use ro water so i know my phos and nitrates are down.

i found this crab eating on the sand bed next to a rock with a bunch of holes, i took out the rock and sadly the crab died on extraction.

would this be a sps eating crab or any type of coral eating crab

Looks similar to one that I found eating my digitata. The one in mt tank was tiny,a bit bigger than a grain of rice. Insane!