common sea slater

<em>Ligia oceanica</em>, the common sea slater, is a large terrestrial isopod crustacean in the family Ligiidae, order Isopoda, widely distributed along the rocky shorelines of the northeastern Atlantic, including records from Belgium, Denmark, Norway, Portugal, and Sweden. This species occupies the supralittoral zone — the spray-splash region just above the high tide mark — where it scavenges on decaying organic material, algae, and biofilms on rocky surfaces. <em>Ligia oceanica</em> is notably well adapted to the interface between marine and terrestrial environments, relying on moisture from wave splash and humid air while remaining capable of functioning outside water. It is active primarily at night, retreating into crevices and under rocks during daylight hours. The species is classified as Least Concern by the IUCN, with stable populations across its extensive rocky coastline habitat. Biological traits for this species remain poorly documented in the scientific literature, including precise data on average lifespan, body length and weight across populations, and detailed dietary composition, though its detritivorous and herbivorous feeding habits are well recognized in coastal ecology studies.