Common eurypterid
Type Vermin
CR 1
Environment Temperate or warm ocean

Source: Souls for Smuggler's Shiv, pg(s). 78-79

The common eurypterid is, like its name suggests, the most prolific variety of eurypterid to be found in Golarion's oceans. This aggressive aquatic predator can be found along the western coast of Garund, where it terrorizes sailors and coastal land-dwellers alike. A single sting from a common eurypterid is generally only strong enough to kill small children or the elderly, although this man-sized specimen is hardy enough to make short work of its prey with its sharp pincers instead.[1]