The tendrils of blood coral are treated as having fractal digits, capable of slowly disassembling their prey on a molecular scale, passing molecules down the tendrils, from hair to hair, to fertilize the roots. This rarely does significant damage, as the process is quite painful and impossible to ignore and so most victims will leave before real damage is done. The bigger threat is the holes the tendrils leave as they burrow through vacc-suits.
As with fractal digits, blood coral does 1d10 DV per 5 minutes.
Blood coral only reacts to biomorphs, which they are able to sense even through vacc-suits.