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; the process is quite painful and impossible to ignore. 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.