Geophilus admarinus is a species of soil centipede in the family Geophilidae.[1] It's found in southeast Alaska under stones near the low tide mark[2] and is capable of surviving prolonged submersion underwater.
G. admarinus grows to about 25 millimeters in length and has around 47 leg pairs. It's characterized by a head longer than it is wide; first maxillae with palpus and inner process both conically pointed and each having typically 5 setae on its ventral face; smooth claws of the second maxillae; concave labrum; median division straight or slightly concave, bearing 5 long, basally dark teeth, and lateral division pectinate; syncoxite bearing a lappet on each side; coxae broadly united with no trace of a median suture; unarmed prosternum of poison claws with an absence of chitin lines and minute teeth at the base; and an absence of ventral pores.[3]