This paper presents some biological features of juvenile and adult specimens of Atlantic bonito, Sarda sarda (Bloch, 1793), in the eastern middle Adriatic Sea. A total of 194 specimens were analysed, of which 93 were juveniles and 101 were adults. Juvenile individuals ranged from 5.7 to 8.4 cm while adults ranged from 39.3 to 56.7 cm. In order to analyse biometry, nine morphometric characters were analysed. Length-length equations for overall converted body lengths of fish were linear. Comparison of length-length relationships between juvenile and adult specimens showed statistically significant differences in almost all morphometric characteristics, except for the fork length–second dorsal fin base. Females insignificantly prevailed in adults. Overall gonads were in post-spawning state. Juveniles were unsexed. Length-weight relationships of juveniles and adults were W = 0.0033LF3.424 and W = 0.0149LF2.984, respectively. U radu su analizirani juvenilni i adultni primjerci palamide, Sarda sarda (Bloch, 1793), prikupljeni na području istočnog dijela srednjeg Jadranskog mora. Ukupno je obrađeno 194 primjerka, od čega je 93 juvenilnih i 101 adultni. Analizom biometrijskih svojstava zabilježene su promjene morfometrijskih odnosa s porastom vilične dužine (LF), te je utvrđeno da postoji statistički značajna razlika između morfometrijskih odnosa juvenilnih i adultnih primjeraka palamide, osim kod odnosa LF-LD2. Spol je bilo moguće odrediti samo kod adultnih primjeraka, gdje su brojčano neznatno dominirale ženke. Analizom stanja gonada utvrđeno je da su se svi adultni primjerci izmrijestili. Kod juvenilnih primjeraka dužinsko–masenim odnosom je utvrđena pozitivna alometrija (b = 3.424), dok je kod adultnih primjeraka utvrđena izometrija (b = 2.984).