|Deep Pool Threshfin|
Deep Pool Threshfins are a subspecies of Threshadon which are known only to inhabit the submerged temple ruins now known simply as Blackfathom Deeps. They are opportunistic predators, and therefore will attack larger creatures moving by, including unwary sapients. How they got into the area is not currently understood. It is assumed that Old Serra'kis is of this species, as it too resides in this location.