Raikos brontarctus
Zone 11 has been mostly unchanged since the Genesis Age. It's home to an Algaeayan, a Sukopod that eats the Algeayan, and a microscopic decomposer. There are many open niches due to this low diversity, though the freezing temperatures are a difficult there is little competition for new species. One open food source Zone 11 is iron. Iron that is created or flows into the bay has to be brought back out of the bay in order to be oxidized.
The ancestors of Raikos brontarctus, Raikos electra, started using a wide variety of enzymes, with those that worked well under colder temperatures edging out enzymes that perform better in warmer waters. This adaptation let them survive in the cold waters of zone 11. Raikos brontarctus is a microscopic 7μm Raikodoban that is similar to its ancestor. Continuing to oxidizes iron, save the electrons, etc. Their electrical abilities are entirely used for reproduction. This comes from the fact that they only reproduce through binary fission at temperatures below freezing when an individual has enough stored electrons to generate enough heat to reproduce.
Being small microbes, Raikos brontarctus get swept up to the surface although others stay on the seafloor. While they have nothing to eat them at the surface, those on the seafloor can fall victim to the populations of Caspabrachium lumupeses. Raikos brontarctus still has a decently high reproductive rate, although not as high as its ancestor or close relatives.