Locations | Concentration | Reference |
Langat Estuary—Malaysia | 2480 | [20] |
East coast of Malaysia | 590 | [27] |
Singapore | 82,410 | [29] |
Egypt Mediterranean sea | 22,600 | [35] |
Naples harbor, southern Italy | 31,774 | [36] |
Gulf of Fos area, France, Mediterranean sea | 2700 | [37] |
Italian marine protected areas | 1550 | [38] |
Xiamen Sea, China | 1177 | [39] |
Jakarta Bay, Indonesia | 77,700 | [40] |
Wesha coastal area, Pemba Island Tanzania | 158.38 | This study |