The Denobulan blood worm was an animal native to Denobula. Millions of them were consumed by Tartan voles at the start of their reproductive cycle.
During the Multilateral DMA Strategy Assembly in 3190, Captain Michael Burnham noted that the destruction wreaked by the Dark Matter Anomaly may not necessarily reflect malice, just as neither the depredations of Tarkan voles on on Denobulan blood worms nor Polyphemus moth caterpillars on crops indicated intent. (DIS: "...But to Connect")