The fish catches were carried out by the scientific midwater non-closed trawl. There was a small-mesh section with minimum mesh size of 0.11-0.07 mm in the trawl bag. Vertical opening of the trawl made up to 6 m. The trawling duration under catches in the sound-scattering layers made 30 min. Speed of trawling made 3.0 knots. The trawling survey has been carried out in the Equatorial zone along 6°, 12°, 18° and 24° W meridians with about 1o intervals by latitude. 56 total catches in the upper 120 m layer (25 at the daytime and 31 in night) have been fulfilled. For sound-scattering layers catching 22 trawlings at the daytime at the 250-425 m depths scale and 37 night trawlings from the surface to 172 m have been carried out. Each catch was weighted. Fish was determined up to the lowest taxonomic ranks - species, in some cases - genus. Total number and mass of each species in a catch, and average dry mass of one specimen of a species were determined. The standard fish body length (SL) was measured in mm (from the tip of snout to the basement of the middle rays of the caudal fin). The samples were fixed in 10% buffered formaldehyde for further processing in the IBSS laboratories.