FSS (Fisheries Science Services) within the Marine Institute will carry out an acoustic survey along the west and northwest coasts (ICES Division VIIb, c and VIaS) to assess the size of summer feeding aggregations of herring within the Malin shelf stock complex. This survey will be the third in a new time series and a step away from the traditional spawning stock surveys focusing on autumn and winter spawning components carried out in quarter 1. Measurement and collection of: Acoustic noise in the water column Fish abundance in water bodies Fish behavior Temperature of the water column