The Jiaozhou Bay is a tidal inlet of bedrock bay type, the typical flood and ebb tidal deltas are developed inside and outside the bay mouth, and the geomorphologic system in the bay is complete.

• 胶州湾属基岩海湾型潮汐通道,湾口内、外发育较为典型的涨、落潮流三角洲,地貌体系较为完整。