Abstract: The present study includes the distribution of Gracilaria verrucosa (Hudson) Papenfuss in Izmir Bay (Easretn Aegean Sea). Samples were collected from a total of 35 stations along the lagoon areas seasonally between July 2001 and April 2002. In order to determine the abundance of G. verrucosa in 1 m2 area, the stations were chosen according to the depths of the water. Results showed that G. verrucosa reached the highest in April 2002 by a value of 7.7 kg ww m-2 and also the lowest value was 0.7 kg ww m-2 in July 2001.