Group 1 - The core concept of "Deep Sea Technology" is the intersection of policy certainty under "bottom line thinking," focusing on domestic demand expansion, technological innovation, and international trade as key response strategies to external shocks [4][13][14] - The introduction of "Deep Sea Technology" solidifies the policy status of the marine economy, marking a shift from supplementary industries to a core component of national strategic emerging industries, indicating a new phase in the top-level design of China's marine economy [5][18] - The "Deep Sea Technology" industry chain is complex and interdisciplinary, with core technologies categorized as "three deep" technologies: deep diving, deep drilling, and deep networking [6][26] Group 2 - The upstream of the deep sea technology industry chain includes raw materials and components, requiring high-pressure resistance and corrosion resistance, while the midstream focuses on industrialization capabilities in deep sea detection, equipment manufacturing, and system integration [6][26] - The downstream includes mature sectors like deep sea oil and gas development, while emerging areas such as natural gas hydrate commercialization and marine renewable energy are in early stages, indicating future growth potential [32] - The policy framework for deep sea technology has established a dual-driven development model at both national and local levels, with significant initiatives from various provinces to enhance marine industry capabilities [22][25]

Core Viewpoint - The discovery of the abyssal lionfish, a vertebrate species living at extreme depths of over 8000 meters, highlights its unique adaptations to survive in high-pressure, low-temperature environments [4][6]. Group 1: Characteristics of Abyssal Lionfish - The abyssal lionfish is known for its distinctive appearance, resembling a tadpole with a generally pale or nearly transparent body, lacking scales and sharp teeth [4]. - It has a body length ranging from a few centimeters to several tens of centimeters, with a large head and a gradually tapering tail, utilizing its developed pectoral fins for elegant swimming [4]. - Due to its deep-sea habitat, the abyssal lionfish has reduced vision and olfactory senses, relying on a well-developed auditory system and sensory pores to detect food [4]. Group 2: Evolution and Distribution - Research indicates that abyssal lionfish evolved from ancestors living in shallower waters, gradually adapting to deeper environments as oceanic trenches formed [5]. - Despite geographical isolation in different trenches like the Mariana Trench and Japan Trench, abyssal lionfish exhibit similar depth distribution, morphology, and bait behavior [5]. Group 3: Adaptation Mechanisms - The abyssal lionfish employs a strategy of "yielding to pressure" rather than resisting it, having evolved to lack a swim bladder and possess pressure-resistant cartilage [6]. - Its head structure is not fully enclosed, preventing brain cavity rupture under high pressure, while a collagen-rich gel-like substance on its surface aids in maintaining internal stability and buoyancy [6]. - Increased unsaturated fatty acids in muscle tissue help maintain membrane fluidity and order under extreme conditions, with key mutations in synthetic enzymes and chaperone proteins enhancing protein stability [6]. Group 4: Future Research Directions - Despite significant findings regarding the molecular mechanisms of the abyssal lionfish's adaptations, many secrets about its survival and reproduction in deep-sea ecosystems remain to be uncovered [6].