One of the main tasks of the study of fish stocks is to achieve a correct management of fishery resources. Sometimes this management is done based on the data provided by the fishing sector itself (captures, efforts, etc.). Therefore, fisheries research campaigns represent an alternative, more reliable source of data to assess the wild fish populations. On this occasion, we are identifying an amazing fish from the depth, Chauliodus sloani (Sloane's viper), that has been captured in the survey.