School of Agriculture Ludong University Yantai 264025 China;
Key Laboratory of Marine Genetics and Breeding Ministry of Education College of Marine Life Science Ocean University of China Qingdao 266003 China;
College of Life Sciences Yantai University Yantai 264005 China;
tumor necrosis factor-alpha(TNF-α); Verasper variegatus; metamorphosis; peripheral blood leukocytes(PBLs); 3D modeling; pathogen-associated molecular patterns(PAMPs);