Chocolate chip starfish

[Wall_Tank]

I was cleaning up the remnants of my harlequin shrimp's meal.   The knobs on the back of the starfish are calcium based.

[Wall_Tank]

And here is the harlequin.

[Bucknutz]

So they don't eat the calcium based knobs?

[Wall_Tank]

They just eat the tissue, there is a white pile under the overhang where he fed.  Most of it was like large grans of sand.... except for the larger knobs.