Identify: Red branching coral-like growth all over tank.

[mitchelljared]

In our 135 gallon tank, we have noticed maybe 20 or so bunches or growth seen in the pic below. Maybe coral, maybe not sponge? They are about 1-2mm in size, and seem to have a calcareous skeleton. They are in bright light, as well as under overhangs. Any ideas?

We have a medium devil's hand/strawberry coral in the tank, maybe related?