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This study reports on the jellyfish (Cnidaria: Scyphozoa) fishery in Pakistan for the first time. Two jellyfish species: Catostylus perezi and Rhopilema hispidum, marketed with the trade names: banana and flower-jellyfish, respectively, are commercially exploited in Pakistan with the former being caught and exported in much higher relative quantities. C. perezi is fished in Balochistan, while R. hispidum is fished in Sindh province. Fishing seasons vary between February/March to July/August and 8–10 companies are regularly processing jellyfish, primarily using the oral arms, their fused-portion and scapulets, while umbrellas are typically not processed. The industry in the region has great potential because C. perezi occurs at high abundances in the northern Arabian Sea along the Balochistan coast of Pakistan. ; Fil: Gul, Shahnawaz. Jamia Millia Government; Pakistán ; Fil: Jahangir, Shahnaz. University Of Karachi; Pakistán ; Fil: Schiariti, Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; Argentina

Over the last 50 years there has been an increased frequency and severity of negative impacts affecting marine fishery and aquaculture sectors, which claimed significant economic losses due to the interference of stinging gelatinous organisms with daily operational activities. Nevertheless, original scientific information on jellyfish-related incidents, their consequences, and potential preventative and mitigation countermeasures is limited and scattered across gray literature, governmental technical reports, and communication media. A literature scan searching for records of any interactions between jellyfish and the marine fishery/aquaculture sectors was carried out. Out of 553 papers, 90 contained original information, referring to more than 130 cases worldwide of negative impacts of jellyfish on marine fishery/aquaculture over the last century. Calling attention on too often neglected socio-economic and ecological impacts of jellyfish blooms, the purpose of this paper is to review and analyze the most up-to-date research on this subject and to provide a global perspective on the importance of jellyfish impacts and their cascading effects on marine fishery and aquaculture sectors.

The most extensive volume yet in the series, this book explores whether jellyfish blooms have increased globally, and what factors may have contributed to the abundance of jellyfish. Covers scyphozoans, hydrozoans, cubozoans, staurozoans and ctenophores

Jellyfish can form erratic blooms in response to seasonal and irregular changes in environmental conditions with often large, transient effects on local ecosystem structure as well as effects on several sectors of the marine and maritime economy. Early warning systems able to detect conditions for jelly fish proliferation can enable management responses to mitigate such effects providing benefit to local ecosystems and economies. We propose here the creation of a research team in response to the EU call for proposal under the European Maritime and Fisheries Fund called "Blue Labs: innovative solutions for maritime challenges". The project will establish a BLUELAB team with a strong cross-sectorial component that will benefit of the expertise of researchers in IT and Marine Biology, Computer Vision and embedded systems, which will work in collaboration with Industry and Policy maker to develop an early warning system using a new underwater imaging system based on Time of Flight Laser cameras. The camera will be combined to machine learning algorithm allowing autonomous early detection of jellyfish species (e.g. polyp, ephyra and planula stages). The team will develop the system and the companion software and will demonstrate its applications in real case conditions.

Recent scientific inquiry into the lives of jellyfish has typically tied them to two, seemingly dichotomous futures. For nearly a decade, scientists have suggested that jellyfish may be taking over the oceans. Favourably responsive to the conditions of warming and increasingly hypoxic oceans, jellyfish blooms have – it seems – grown in number in recent decades, a sign of depleted oceans to come. Simultaneously, scientists have experimented with jellyfish biomaterials – including their tentacles, mucus, collagen and stem cells – to better sense and respond to environmental and biological conditions. In doing so, they have mined jellyfish for pharmaceutical, environmental and cosmetic treatments, suggesting that these jellyfish matters will play a role in the salvation of human life on Earth. Such trends in jellyfish research have re-made them as, in the words of Dmitri Papadopoulos and his co-authors, a 'reactivated element' of bioremediation. For them, elemental reactivations can create new situations by 'catalyzing new modes of thought and action, waking up new insights from the slumber of the familiar and mundane'. While the uptake of jellyfish within a newly entangled sensory environment seems to promise a redistribution of agency and knowledge production across a multi-species collective, I argue here that it ultimately reifies familiar worlds. Namely, I explore how jellyfish have joined other biological agents as sensory devices and remediation technologies amid a world of petrochemicals. Through a close reading of scientific texts and interviews with scientists, I show how engagements with jellyfish reproduce the structures of petrocapitalism rather than shaking them. I ultimately consider how the concept of the 'glitch' in digital media might expand understandings of jellyfish beyond fossil fuels and the history of extractivism.

Jellyfish and Human Enterprise: Fisheries and Tourism -- Medical aspects of jellyfish envenomation: pathogenesis, case reporting and therapy -- Jellyfish as food -- Jellyfish fisheries in southeast Asia -- Interactions of pelagic cnidarians and ctenophores with fish: a review -- Feeding on survival-food: gelatinous plankton as a source of food for anchovies -- Jellyfish and Changing Ecosystems -- Jellyfish blooms: are populations increasing globally in response to changing ocean conditions? -- Pelagic coelenterates and eutrophication: a review -- Effects of low dissolved oxygen on survival and asexual reproduction of scyphozoan polyps (Chrysaora quinquecirrha) -- Numerical increases and distributional shifts of Chrysaora quinquecirrha (Desor) and Aurelia aurita (Linné) (Cnidaria: Scyphozoa) in the northern Gulf of Mexico -- Timing and size of blooms of the ctenophore Mnemiopsis leidyi in relation to temperature in Narragansett Bay, RI -- The impact of El Niño events on populations of mesopelagic hydromedusae -- Jellyfish swarms, tourists, and the Christ-child -- The ctenophore Mnemiopsis in native and exotic habitats: U.S. estuaries versus the Black Sea basin -- Chemical composition, respiration and feeding rates of the new alien ctenophore, Beroe ovata, in the Black Sea -- The new invader Beroe ovata Mayer 1912 and its effect on the ecosystem in the northeastern Black Sea -- Physical/Hydrodynamic Interactions With Jellyfish -- A physical context for gelatinous zooplankton aggregations: a review -- Developing jellyfish strategy hypotheses using circulation models -- Flow and prey capture by the scyphomedusa Phyllorhiza punctata von Lendenfeld, 1884 -- Jellyfish Reproduction and Population Biology -- Reproduction and life history strategies of the common jellyfish, Aurelia aurita, in relation to its ambient environment -- In situ estimation of ephyrae liberated from polyps of Aurelia aurita using settling plates in Tokyo Bay, Japan -- Geographic variation and ecological adaptation in Aurelia(Scyphozoa, Semaeostomeae): some implications from molecular phylogenetics -- General Ecology of Jellyfish -- Observations on the distribution and relative abundance of the scyphomedusan Chrysaora hysoscella (Linné, 1766) and the hydrozoan Aequorea aequorea (Forskål, 1775) in the northern Benguela ecosystem -- A novel cilia-based feature within the food grooves of the ctenophore Mnemiopsis mccradyi Mayer -- Protistan epibionts of the ctenophore Mnemiopsis mccradyi Mayer -- Digenea parasites of jellyfish and ctenophores of the southern Atlantic -- Food and feeding of Aurelia aurita in Tokyo Bay with an analysis of stomach contents and a measurement of digestion times -- Distribution, abundance, behavior and metabolism of Periphylla periphylla, a mesopelagic coronate medusa in a Norwegian fjord.

This essay combines impressions of the Drifters exhibit at the Monterey Bay Aquarium with reflections on how one might approach an encounter with a being whose ways of knowing and sensing challenge anthrocentric logics. Rather than view the immersive exhibit's jellyfishes as part of a romanticized nature in opposition to human culture or as sympathetic by virtue of some forced familiarity to humans, the author traces the path by which "jellies" have exerted a unique agency throughout the history of their captivity and, in doing so, forges a politics of the alien, in which empathy does not rely on similarity. This essay does for the reader what the aquarium has done for the author: paints a multisensory picture of the world experienced through the tentacles of a creature historically reduced to the object of human spectatorship. Though she demonstrates how humans have constructed the ocean by displaying organisms necessarily removed from their natural habitat, the author holds this train of thought in suspension to contemplate the aspects of sea life that have escaped the epistemological taming that makes the mysterious ocean intelligible to land-dwelling humans. The radical alterity of jellies serves as a reminder of the limits of anthrocentric, anthropomorphic, and scopophilic knowledge.