1.5 year old hitch hiker?

[IlliniMed]

Hey all ... so I’ve had my tank for a little over 1.5 years. Been through one move where I got rid of sand and put new sand and set up rocks differently too. Saw this shell tonight for the first time. Am I seeing a crab or am I crazy? Never seen one in the tank before. If so... crazy good hider after 1.5 years.

 

[ReeferReefer]

Looks like a crab to me. I am not surprised that you didn't see it. Most crabs like to hide most of the time. I only see my emerald crab a few times a year it seems.