Answer: threshers

AnswerCrossword Clue
THRESHERSHarvesting machines
THRESHERSFlails
threshersA surface-living shark with a long upper lobe to the tail. Threshers often hunt in pairs, lashing the water with their tails to herd fish into a tightly packed shoal
threshersTHRESHER, one that threshes (to separate grain or seeds)
threshersA person or machine that separates grain from the plants by beating