Moving green blob on live rock?

[Cornishlass]

Its still in the same spot. I will monitor it and see what happens.

 

[devimik]

Definitely not a stomatella then as they don't just sit there.

 

[SeaCucumberFan]

Then it's a bivalve

 

[Cornishlass]

Then it's a bivalve

Ive looked at pics online and it looks nothing like the pics. Its also soft.

 

[inktomi]

Would a bivalve be soft when you touch it though? Don't they have hard shells?