The United Republic of Tanzania, also called Tanzania, is a country composed of Mainland Tanzania and the islands of Zanzibar. Tanzania's domestic laws promote sustainable development of the marine environment; however, since the beginning of the 21st century, the country has been importing large quantities of oil, resulting in an increased risk of vessel-source oil pollution damage. Through a comparative analysis, this article examines the laws addressing this issue in Mainland Tanzania and Zanzibar, the progress that has been made in the legal environment and the challenges that remain, and it discusses possible solutions and improvements. The article reveals that weak implementation of domestic laws for marine environment conservation, a lack of harmonization between domestic laws regarding this issue, and weak domestication of relevant ratified international conventions are among the challenges currently hindering the sustainability of Tanzania's marine environment.

坦桑尼亚联合共和国，又称坦桑尼亚，是由坦桑尼亚大陆和桑给巴尔群岛组成的国家。坦桑尼亚的国内法促进海洋环境的可持续发展；然而，进入21世纪以来，该国大量进口石油，导致船舶油源污染损害风险加大。通过比较分析，本文考察了坦桑尼亚大陆和桑给巴尔解决这一问题的法律，在法律环境方面取得的进展和仍然存在的挑战，并讨论了可能的解决方案和改进措施。文章揭示了国内海洋环境保护法律执行不力，国内法律在此问题上缺乏统一，