Munidopsis serricornis

Munidopsis serricornis is a squat lobster belonging to the family Munidopsidae, a group of decapod crustaceans adapted to deep-sea environments. Like other squat lobsters, it has a small, laterally compressed body, a reduced abdomen tucked beneath the thorax, and long, spiny walking legs and claws that give it a crab-like appearance despite its lobster lineage. It is a benthic scavenger and opportunistic predator, feeding on organic detritus and small invertebrates on the seafloor, and it likely plays a role in nutrient cycling within deep benthic communities.

The species has a wide geographic distribution, having been recorded off the coasts of Spain, Portugal, France, the United Kingdom, Ireland, Norway, and Svalbard, as well as in the Caribbean, Cape Verde, Western Sahara, Brazil, the United States, and across parts of the Pacific and Indian Oceans including Australia, New Zealand, Indonesia, and Micronesia. It inhabits marine environments, typically on continental slopes and deep benthic substrates.

Its endangered status stems from several converging pressures. Bottom trawling and deep-sea fishing operations physically disturb its seafloor habitat and can cause direct mortality through bycatch. Deep-sea mining activities threaten to disrupt substrate structure across its range.

Climate change and ocean warming, along with ocean acidification, alter deep-water chemistry and temperature regimes that this species depends on, while broader habitat degradation compounds these effects.

Population trends remain unknown due to the logistical difficulty of surveying deep-sea habitats. Specific conservation measures targeting this species have not been well documented, though some regions have implemented restrictions on bottom trawling and deep-sea mining. Given the ongoing and expanding nature of these threats, the species' long-term outlook remains uncertain without targeted monitoring and habitat protections.