Fishing for pink shrimp, Penaeus subtilis (Pérez Farfante, 1967), constitutes one of the major environmental impacts of industrial fishing on the north coast of Brazil. This activity is responsible for generating environmental environments, such as the vast diversity of captured aquatic organisms, with or without commercial value (molluscs, fish and crustaceans), called “bycatch” or accompanying fauna. Crustaceans represent one of the main members of this disposal without commercial value, as some taxa tend to be numerous in number of individuals to the detriment of others that occur at low densities. Faced with this problem, the present study aims to identify the diversity of crustaceans captured in the pink shrimp fishery. Data were collected in commercial fishing expeditions in 2018 (June, July and October) on the continental shelf, located between the mouth of the Oiapoque river (5ºN, 51ºW) to São Marcos Bay (2ºS, 44ºW), in Maranhão. By means of on-board observers, 4 shrimp fishing fleets were carried out in a row, where at least 30 hauls (2 per day for 7 days in each expedition) were carried out considering the methodology of separating production into quadrants. The total production was registered and the individuals captured from one of the quadrants were transported in babies to the Fisheries Bioecology laboratory of the UFPA, Bragança campus for identification, following specialized literature, verification of the sex, measurements of each individual and feeding of an image bank. . A total of at least 28 hauls were recorded. Then, the data obtained were entered into spreadsheets in Microsoft Office Excel (2013). A total of 18 captured species were identified, distributed in 8 families and 12 genera, with the species Callinectes danae (Smith, 1869) having the highest occurrence, with the highest relative participation in weight (N=30.65%) and number of individuals ( N=392), followed by the species Callinectes bocourti (A. Milne Edwards, 1879) (N=69), among the captured specimens. It is noticed that the industrial fishing of marine shrimp causes effects of all kinds, especially the capture of juvenile individuals of a variety of species.
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