Fitu waters are ecologically and economically a potential area in Ternate City of North Maluku Province, which can be used to develop marine tourism, fishing locations, and aquaculture. However, there is a lack of information on the condition of Fitu waters. This study aimed to analyze the species composition, abundance, and distribution of phytoplankton. The study was conducted in March-April 2023 at 5 stations with a sampling period fortnightly. A filtration method was used to collect the phytoplankton preserved in 4% Lugol's solution. The results showed 51 genera belonging to the classes Bacillariophyceae (36 genera), Chlorophyceae (2 genera), Cyanophyceae (7 genera), and Dinophyceae (6 genera). The abundance of phytoplankton ranged from 47,560 to 232,545 cells.L-1. The Bacillariophyceae class had a broader distribution compared to the other classes.  For the ecological indices, the diversity index (H') was 1.9208 - 2.5616, the evenness index (E) was 0.6780 - 0.8764, and the dominance index was 0.0925 - 0.2597.