From July 1984 to June 1985, ecological and biological studies were carried out on the blenny Omobranchus punctatus, which inhabits rocky areas of the intertidal zone in Kuwait. Mean water temperatures ranged between 13.6°C and 26.9°C and salinity between 37.1‰ and 44.9‰. The blennies were aged using otoliths and the population consisted of 1-4 year old fish. Gonad development was divided into five maturity stages: immature, maturing, mature, ripe and spent. Both males and females first became ripe during their second year. The peak in gonadosomatic index was in April for females and May for males. Although O. punctatus takes a wide variety of prey, it is mainly opportunistic and predominantly feeds on algae.