Another keystone species in the volcanic regions of Arcadia is the Giant Sulfirtophic Polyp. This organism exists in areas further away from the active lava flows as it is more vulnerable to direct heat. It does play a pivotal role in the ecosystem as it filters out sulfur from the air and water vapor. That way it creates much more hospitable areas for other life forms to thrive in.

In essence, Giant Polyps serve a similar role to trees, filtering out toxins and metabolizing them in order to grow and reproduce. Much like the Vapor Polyps, they reproduce by budding and releasing Sulphuric Jellies which then spread fertilized eggs in areas further away from the main polyp.
The main polyp grows and develops in an area with access to liquid water which the polyp helps to condensate from vapor present in the air; water droplets flow down the body of the polyp and drip down to the ground with the excess pooling in crags and craters.

The pools of water that form around the polyp sustain other small organisms such as Pyre Moss (which is one of the very few plant species tough enough to live in such a hostile environment) as well as a variety of fungi, which include edible mushrooms. All these smaller organisms serve as the basis for the volcanic area's food chain.