{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T23:59:07Z","timestamp":1791244747873,"version":"4.1.0"},"reference-count":140,"publisher":"Zoological Society of Japan","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Zoological Science"],"published-print":{"date-parts":[[2025,1,22]]},"abstract":"<jats:p>The deep sea, which encompasses the largest habitat on Earth, presents a set of extreme and unique environmental conditions, including high hydrostatic pressure, near-freezing temperatures, and perpetual darkness. These conditions pose significant challenges to the survival and energy management of its inhabitants. Deep-sea organisms have evolved a range of bioenergetic adaptations to negotiate these harsh conditions, ensuring efficient energy acquisition and utilization. This review examines the multifaceted strategies employed by deep-sea animals, focusing on three key areas: energy input, digestive and absorptive efficiency, and energy consumption. We examine the physical environment of the deep sea, highlighting vertical profiles of temperature, salinity, and dissolved oxygen, which contrast sharply with surface conditions. Physiological adaptations of deep-sea species, such as specialized digestive systems and enzyme modifications that function optimally under high pressure, are explored in detail. Furthermore, we discuss behavioral adaptations, including diurnal vertical migration, which optimize energy intake and reduce metabolic costs. Comparative analyses with shallow-water species provide insights into the evolutionary pressures that have shaped these adaptations. This review also addresses the concept of \u201cpower budgeting\u201d, in which energy expenditures for specific dynamic actions (SDAs) must be balanced with other metabolic demands. This comprehensive examination of bioenergetic adaptation in deep-sea organisms enhances our understanding of their resilience and adaptability, offering glimpses into the complex interplay between environmental constraints and biological processes in one of the most challenging habitats on the planet.<\/jats:p>","DOI":"10.2108\/zs240061","type":"journal-article","created":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T21:53:31Z","timestamp":1737410011000},"page":"83-95","source":"Crossref","is-referenced-by-count":7,"title":["Dive Deep: Bioenergetic Adaptation of Deep-Sea Animals"],"prefix":"10.2108","volume":"42","author":[{"given":"Mitsuharu","family":"Yagi","sequence":"first","affiliation":[{"name":"Graduate School of Integrated Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sayano","family":"Anzai","sequence":"additional","affiliation":[{"name":"Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shogo","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"848","reference":[{"key":"80","doi-asserted-by":"crossref","unstructured":"K Nakaya, T Tomita, K Suda, et al.  \"Sci Rep.\"  6, \"Slingshot feeding of the goblin shark Mitsukurina owstoni (Pisces: Lamniformes: Mitsukurinidae).\" 27786 (2016)","DOI":"10.1038\/srep27786"},{"key":"130","doi-asserted-by":"crossref","unstructured":"GB West, JH Brown, BJ Enquist,  \"Science.\"  276, \"A general model for the origin of allometric scaling laws in biology.\" 122 (1997)","DOI":"10.1126\/science.276.5309.122"},{"key":"36","doi-asserted-by":"crossref","unstructured":"F Geiser,  \"Annu Rev Physiol.\"  66, \"Metabolic rate and 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