Wild : Presiding almost solely within the island's swamps, Diplocaulus Natatorinutrix is a small amphibian that primarily eats minor fish. It rounds out what I consider the middle-bottom of the ecosystem, feeding on the tinier non-insect creatures of the island while itself being a common snack for the larger carnivores.

Domesticated: There are only a few uses for tamed diplocaulus. It is primarily used the (rather disgusting) practice of employing Diplocaulus as an oxygen bag. Diplocaulus stores air in the bladders of its head, and divers can suck from these bladders to take deep breaths while submerged, supporting long-term underwater exploration without the use of external gear.