Unexpected Life, Jim?

The British Antarctic Survey have found life, where they were least expecting it (https://www.theguardian.com/science/2021/feb/15/researchers-rethink-life-in-a-cold-climate-after-antarctic-find). The scientists were attempting to drill a 1 km borehole through the Filchner-Ronne iceshelf when, at 900m, they hit a boulder. The boulder, which probably dropped from the moving iceshelf, was located in an area of total darkness, with a temperature of -2 degrees Centigrade. To their amazement, their camera revealed filter-feeders, attached to the boulder. These currently unidentified organisms appeared to be sponges and (possibly) tube-living worms or long-necked barnacles. No dead organisms can fall from the surface to these filter feeders (they are under the thick ice), so they must get their nutriment from material (dead planckton?) washed to them from the distant sea. Who needs to look for life on Mars?