This creature is a descendant of the Hexastalker but while most of it's descendants would take to the land this one reverted to an aquatic existence after their world was devestated by an extinction event. They lived near the coastline and adults would swim out to sea in search of fishoids. As tune went on they became better and better suited to this lifestyle, developing powerful tails, thick rubbery hides, powerful lungs that could hold a considerable reserve of up to twenty minutes of air and triangular heads with needle sharp teeth ideal for powering through the water and snapping up their marine prey. They even developed an ability to regulate their internal body temperature to a degree. Their six legs became paddlelike flippers ideal for steering and propelling themselves forward in quick bursts. Beeches and remote islands became home to large rookeries of these creatures as they sunned themselves between dips, though by the time of the Artisans the amount of time that they spent on land was going down.

Seastalkers could get up to three meters long and weighed in at up to 200 kilos. In time they spread to all three of the continents of their world and would be a common sight across the coastlines of the world. However they had one major deficiency which kept them from becoming fully marine, while air breathing juveniles and adults were well adapted to life at sea their water breathing fry were strictly freshwater. As such every year many major waterways would have Seastalker Runs, in which thousands of these creatures would swim up to hundreds of kilometers up river to birth their fry. When the rapids became too harsh, the ungainly amphibiods would crawl overland to bypass them to get to their spawning sites. For many creatures ranging from parasitic conecrabs to prowlers this meant that a large seasonal surge in the availability of protein. Seatalkers were not totally defenseless with snapping maws, but as they sluggishly made their way overland the attrition rate for spawning Seastalkers is high. Fortunately the number of offspring each Seastalker produces is in the tens of thousands.