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Open research questions in Marine Invertebrate Physiology and Ecology

113 gap statements mined from Marine Invertebrate Physiology and Ecology papers in our 4.5M-paper local library, which holds 378 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • There is a lack of specific antidotes based on the toxic mechanism of jellyfish venom in clinical practice. The current treatment measures are mostly empirical and supportive, with uncertain therapeutic outcomes. The authors identify the need for a more effective and targeted treatment approach against jellyfish venom.

    Enhanced Protection Against Toxicity of Nemopilema nomurai Venom Using a PEG-EGCG/Tetracycline Hydrochloride Micellar Nanocomplex · 2026 · DOI

  • The need for new therapeutic strategies for glioblastoma. The potential of sea anemone toxins as anticancer agents. The lack of understanding of the molecular mechanisms underlying the anticancer effects of sea anemone toxins.

    Crude Venom from Sea Anemone Macrodactyla doreensis Suppresses Glioblastoma via the p53 Pathway · 2026 · DOI

  • The lack of prior knowledge on the protein sequences and their physiological activities hinders the exploration of their potential applications. The study of sea anemone venom requires a multi-omics approach, which can be technically challenging.

    Diversity and Bioprospection of Functional Proteins from Sea Anemone Heteractis magnifica Based on Multi-Omics Approach · 2026 · DOI

  • The knowledge of cnidarian toxin diversity is fragmented across databases and individual studies. There is a lack of comprehensive understanding of cnidarian venoms and their bioactive potential. The diversity and promise of cnidarian venoms as a source of bioactive molecules are not well understood.

    Cnidarian Venoms in the Omics Era: Toxin Discovery and Bioactive Potential · 2026 · DOI

  • The lack of understanding of the cellular and molecular mechanisms of growth regulation in animals with lifelong growth. The need to investigate the epigenetic changes occurring between proliferative and quiescent Vasa2+/Piwi1+ cells. The gap in knowledge about the molecular mechanisms of delayed cell cycle re-entry after prolonged starvation.

    Prolonged starvation deepens quiescence in Vasa2/Piwi1-expressing cells of a sea anemone · 2025 · DOI

  • The lack of understanding of the diversity and mechanisms underlying the chemical defenses of sea anemones. The need for a comprehensive overview of the proteomic profile of A. fragacea.

    Proteomic Diversity of the Sea Anemone Actinia fragacea: Comparative Analysis of Nematocyst Venom, Mucus, and Tissue-Specific Profiles · 2025 · DOI

  • The freshwater cnidarian Hydra vulgaris is a classic model for studying whole-body regeneration, but the underlying cell biology remains comparatively underexplored.

    Collagen remodeling supports Hydra vulgaris head regeneration and stem cell invasion · 2026 · DOI

  • Box jellyfish (Cubozoa) are key predators that prey upon zooplankton and fish, yet their feeding habits and ecological roles remain insufficiently understood.

    Diel feeding patterns, prey selectivity, and predatory impact of the box jellyfish Carybdea brevipedalia (Cnidaria: Cubozoa) · 2026 · DOI

  • Here, we used the top predator Cyanea capillata, a bloom-forming jellyfish, as a target organism since its population structure, dispersal and reproductive patterns in the Baltic Sea-North Sea ecosystem remain poorly understood.

    Unraveling the population structure of blooming Cyanea capillata jellyfish: insights into connectivity between the Baltic Sea and North Sea · 2026 · DOI

  • Rather, changes to venom ecology may represent purposeful adaptations intended to enhance survivorship during bleaching stress, therefore warranting further investigation.

    Attrition or adaptation? Bleaching stress drives changes in sea anemone cnidae and venom · 2026 · DOI

  • The drivers behind the changes observed in this study remain unclear, as some of the responses appeared counterintuitive if interpreted solely as consequences of energetic depletion.

    Attrition or adaptation? Bleaching stress drives changes in sea anemone cnidae and venom · 2026 · DOI

  • In the upside-down jellyfish Cassiopea xamachana, the polyp-to-medusa transition (strobilation) requires the establishment of symbiosis with Symbiodiniaceae algal partners, yet bacterial community dynamics during this developmental process remain unknown.

    Cnidarian–algal partnerships structure bacterial communities during strobilation in Cassiopea xamachana · 2026 · DOI

  • Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.

    Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters · 2026 · DOI

  • We show that bilaterian-like complementarity of seed-only or seed and supplementary 3' matches are insufficient for miRNA-mediated knockdown.

    miRNA-target complementarity in cnidarians resembles its counterpart in plants · 2025 · DOI

  • The molecular and immunological mechanisms underlying the pathophysiology of jellyfish stings are poorly understood. The cellular sources of proteolytic activity in envenomation are uncertain.

    Single-Cell Transcriptomic Analysis Reveals Cell Heterogeneity and Altered Signaling Pathways in Jellyfish Sting Patients · 2025 · DOI

  • However, the correlation between the morphology and function of nematocysts still remains unclear.

    Obtainment of Two Monomorphic Nematocysts from Nemopilema nomurai (Cnidaria: Scyphozoa) and Comparative Analysis of the Biological Activities of Their Contents · 2025 · DOI

  • Gregarious settlement contributes to the formation of jellyfish polyp aggregations, but the mechanism by which larvae detect habitats with conspecifics is poorly understood.

    Waterborne conspecific cues enhance larval settlement in the invasive jellyfish Aurelia coerulea · 2025 · DOI

  • Further validation of the antitoxic effect of PEG-EGCG/HTC nanomicelles in other toxic jellyfish…

    Enhanced Protection Against Toxicity of Nemopilema nomurai Venom Using a PEG-EGCG/Tetracycline Hydrochloride Micellar Nanocomplex · 2026 · DOI

  • DNA samples were lost due to power failures, - identification of Cassiopea to species level was not possible, - the study was limited to three sites, - sampling times varied due to environmental…

    Characterization of Marine Fauna Assemblages in the Presence of Upside-Down Jellyfish (Genus Cassiopea) at Jobos Bay National Estuarine Research Reserve (JBNERR), Puerto Rico · 2026 · DOI

  • Further studies on the molecular mechanisms are needed, - Investigation of the antitumor effects in vivo is required, - Exploration of the potential of sea anemone toxins as anticancer…

    Crude Venom from Sea Anemone Macrodactyla doreensis Suppresses Glioblastoma via the p53 Pathway · 2026 · DOI

  • Further studies on the three-dimensional structures of toxins, - Investigation of the functions and mechanisms of toxins, - Exploration of the biomedical and biotechnological potential…

    Cnidarian Venoms in the Omics Era: Toxin Discovery and Bioactive Potential · 2026 · DOI

  • Investigate whether the composition of cell types changes during starvation-induced shrinkage - Determine whether the accumulation of Vasa2+/Piwi1+ cells results from a protection from cell loss or an expansion by continued…

    Prolonged starvation deepens quiescence in Vasa2/Piwi1-expressing cells of a sea anemone · 2025 · DOI

  • Investigating the emission mechanism of jellyfish nematocysts, - Developing targeted treatment strategies, - Exploring the pharmacological potential…

    Advances in Jellyfish Sting Mechanisms and Treatment Strategies · 2025 · DOI

  • Further studies are needed to explore the molecular and immunological mechanisms underlying jellyfish sting pathophysiology, - Investigation of the therapeutic potential of targeting MMP9+ monocytes and S100A12+ neutrophils, - Application of scRNA-seq to other toxin-mediated…

    Single-Cell Transcriptomic Analysis Reveals Cell Heterogeneity and Altered Signaling Pathways in Jellyfish Sting Patients · 2025 · DOI

  • Expanding the range of tested pathogenic bacteria to more comprehensively understand the antimicrobial spectrum, - Investigating the nematocyst classification, functional characteristics, and venom…

    Obtainment of Two Monomorphic Nematocysts from Nemopilema nomurai (Cnidaria: Scyphozoa) and Comparative Analysis of the Biological Activities of Their Contents · 2025 · DOI

Most-cited papers in Marine Invertebrate Physiology and Ecology

Most recent work

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Open questions raised by papers listed on this page include: (1) There is a lack of specific antidotes based on the toxic mechanism of jellyfish venom in clinical practice (“Enhanced Protection Against Toxicity of Nemopilema nomurai Venom Using a…”, 2026); (2) The lack of understanding of the molecular mechanisms underlying the anticancer effects of sea anemone toxins (“Crude Venom from Sea Anemone Macrodactyla doreensis Suppresses Glioblastoma via…”, 2026); (3) The lack of prior knowledge on the protein sequences and their physiological activities hinders the exploration of their potential applications (“Diversity and Bioprospection of Functional Proteins from Sea Anemone Heteractis…”, 2026); (4) There is a lack of comprehensive understanding of cnidarian venoms and their bioactive potential (“Cnidarian Venoms in the Omics Era: Toxin Discovery and Bioactive Potential”, 2026); (5) Box jellyfish (Cubozoa) are key predators that prey upon zooplankton and fish, yet their feeding habits and ecological roles remain insufficiently understood (“Diel feeding patterns, prey selectivity, and predatory impact of the box…”, 2026). 113 gap statements have been mined from Marine Invertebrate Physiology and Ecology papers in our 4.5M-paper local library, which holds 378 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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