Are we? I would have likened those species under Antarctica ice to ~plants (well, sponges are technically considered animals). Invasive starfish species and alg

Are we? I would have likened those species under Antarctica ice to ~plants (well, sponges are technically considered animals). Invasive starfish species and algae are a thing, for instance. Some invasive species have adapted to sustain themselves with little light or nutriments. When placed in richer environments, they can reproduce really quickly, outnumber other species and drive them out by competing for resources.