The present study is an extension and continuities of our previous study on deep-seafishery resources. The main purpose is to establish basic information for the speciesidentification, ecological conservations, exploitation of resources, etc., of the macrurandecapods and deep-sea cephalopods. The sonar sounding records of the present studyshow that the sakura shrimp (Sergia lucens) is distributed in the waters around the GueishanIslet and undertakes an apparent diurnal vertical migration. The resources areestimated to 333 metric tons.On the other hand, the sex of Thysanotheuthis rhombus may be distinguished visuallygreater than 250mm ML. The sexual ratio shows that the males are more than femalesaround the year, except January to March. Testis maturation has been observed in maleat 250-350mm and ovary maturation in female at 500-650 mm. The smallest maturefemale observed was 500mm ML, and the majority mature at 550-650mm ML.Spermatophores of male beginning from 570mm ML, and majority mature 650mm ML.