Sea cucumber turned white?

[TJRawDawg]

Did my cucumber suddenly die? He was missing for a couple days and now we found what looks to be him laying under a rock completely white?

 

[Perthegallon]

They move mine just stays attached to one rock

 

[TJRawDawg]

To clarify, This was originally a RED sea cucumber

 

[Perthegallon]

Oh mine is yellow

 

[TJRawDawg]

Never mind. He was dead sludge