Emerging Marine Nematodes as Model Organisms: Which Species for Which Question?
2025
Federica Semprucci | Eleonora Grassi | Adele Cocozza di Montanara | Roberto Sandulli | Elisa Baldrighi
Marine nematodes possess all the prerequisites to serve as “simpler models” for investigating biological phenomena and are gaining attention as emerging model organisms. This review evaluates their potential to address diverse biological questions regarding ecosystem functioning, climate change adaptation, host–microbe interactions, ecotoxicology, and biotechnological applications. Among the reviewed taxa, <i>Litoditis marina</i> and select Monhysteridae species, such as <i>Diplolaimella dievengatensis</i>, <i>Halomonhystera disjuncta</i>, and <i>Diplolaimelloides</i> spp., emerge as leading candidates due to their manageable life cycles, adaptability to laboratory conditions, and available genomic resources. These tiny organisms provide valuable insights into phenomena such as developmental plasticity, epigenetic regulation, and adaptive responses to environmental stress. Symbiotic relationships in Stilbonematinae and Astomonematinae, alongside the antimicrobial properties of the Oncholaimidae species, offer unique opportunities to explore mutualistic evolution and resilience in extreme environments. Despite challenges in culturing these species, recent advances in culturing other meiofaunal organisms with chemosynthetic symbionts have opened up promising opportunities. The roles of marine nematodes as ethical and versatile models position them to address pressing challenges in biological and biomedical research, highlighting their significant potential for future studies.
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