The experimental infection of surge wrasses fish by Tenacibaculum maritimum was successfully conducted through immersion bath for 18hrs in 1.5x106 suspension, the infected fish exhibited skin ulcers, stomatitis, tail rot, signs of respiratory distress as gasping and accumulation at air source site in association with 60% mortality. Carvacrol is a major compound of oregano and thyme and has antimicrobial activity against wide range of microorganismes. The in vitro susceptibility assay proved strong effect of carvacrol on T. maritimum. 100ppm of both carvacrol and its precursor cymene for 14 days as food additives controlled the tenacibaculosis in surge wrasses fish and no clinical signs or mortality could be recorded in the treated fish. 50ppm of them prevented the disease clinical signs and reduced mortality to 10%.