Principal component analysis (PCA) results of the five of Lethrinus species samples in the presently reported study in the Persian Gulf and the Gulf of Oman; (A) morphospace plotted on 14 morphometric traits; and (B) morphospace plotted on 10 meristic traits morphometric traits; L. borbonicus (green), L. crocineus (yellow), L. lentjan (red), L. microdon (blue), L. nebulosus (black). LLS = lateral-line scales; SALL = scale rows above lateral line; SBLL = scale rows below lateral line; LSACP = scale around caudal-peduncle; SPS = supratemporal patch of scales; BD = body depth; HL = head length; POL = preorbital length; UJL = upper-jaw length; CPD = caudal-peduncle depth; CPL = caudal-peduncle length; PDL = predorsal length; PAL = preanal length; PPL = prepelvic length; LDFB = length dorsal-fin base; LAFB = length anal-fin base; LPF = length pectoral fin; LCF = length caudal fin; OD = orbit diameter [% of HL].