Martaza Lagoon (Ukrainian: Мартаза, Romanian: Caraceauş) is a small salty lagoon in the Tuzly Lagoons group in Bilhorod-Dnistrovskyi Raion of Odesa Oblast, Ukraine.

It is separated from the Shahany Lagoon by the sandbar in its north part, near the village of Rybalske (old name - Martaza).

The water body is included to the Tuzly Lagoons National Nature Park.

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