Prolonged recovery with increased anaesthetic dosage has been repoted in seven species of tropical reef teleosts (Cunha and Rosa,2006),sockeye salmon (Woody et al.,2002) and cobia,Rachycentron canadum (Gullian and Villanueva,2009) However,decreasing recovery times with an increase in concentration of clove oil and 2-phenoxyethanol (PE) for European sea bass (Dicentrachus labrax) and gilthead sea bream (Sparus aurata) been reported by mylonas et al.(2005)