Baby Starfish grow time

[ritchieco]

I bought some pavona coral this week and to my suprise there were two baby starfish included, white color right now and about the size of a q-tip head if that.
I was wondering how long it would take for them to grow?
They seem to be doing well and staying on the glass and moving alot.
I bought the coral on sale because it was in bad shape, but I added calcium and is coming back to life.
My tank is 40 gal, with about 30lbs of live rock, 4 damsels, protein skimmer, wavemaker, live sand.
All is healthy and well.

 

[cranberry]

Iam sure they are a variety of micro brittlestar. It's a harmless hitchhiker that won't grow much bigger than ya see now