The Ceram Sea (also spelled Seram Sea) (click here to see map) is a biodiverse body of water located in eastern Indonesia, between the islands of Sulawesi to the west, New Guinea to the east, Buru and Seram to the south, and the Maluku Islands to the north. It connects to the Pacific Ocean via the Halmahera Sea and to the Banda Sea through the Manipa Strait. Known for its rich marine biodiversity, the Ceram Sea is part of the Coral Triangle, home to vibrant coral reefs and diverse aquatic species.
Which Countries Border the Ceram Sea?
The Ceram Sea lies entirely within Indonesian territorial waters. It is surrounded by two Indonesian provinces:
- Maluku (containing major islands like Seram, Buru, and Ambon)
- West Papua (eastern side near New Guinea)
Unlike larger seas, the Ceram Sea does not border any other countries, making it a uniquely Indonesian marine region.
How Deep is the Ceram Sea?
The Ceram Sea has a maximum depth of around 5,318 meters (17,448 feet) in the Weber Deep, one of the deepest points in Indonesia’s waters.
- Average depth: ~1,000–2,000 meters (3,280–6,560 feet)
- Shallower coastal areas: Near islands like Seram and Buru
This extreme depth contributes to its unique marine ecosystems, attracting scientists and divers alike.
What Major Islands Are in the Ceram Sea?
The sea is dotted with tropical islands, the largest being:
- Seram (the namesake of the sea)
- Buru (known for rainforests and wildlife)
- Ambon (a popular tourist destination)
- Obi Islands (rich in nickel mining)
- Sula Islands (gateway to the Pacific)
These islands are part of the Maluku archipelago, historically known as the “Spice Islands” for their nutmeg and clove trade.
Is the Ceram Sea Part of the Pacific Ocean?
Yes, the Ceram Sea is a marginal sea of the Pacific Ocean, connected via:
- Halmahera Sea (to the north)
- Banda Sea (to the southwest)
It plays a crucial role in ocean currents flowing between the Pacific and Indian Oceans.
Why is the Ceram Sea Ecologically Important?
The Ceram Sea is a marine biodiversity hotspot because:
- Part of the Coral Triangle – Home to 76% of the world’s coral species
- Rich in fish populations – Tuna, mackerel, and reef fish thrive here
- Endangered species habitat – Supports Sea turtles, dugongs, and whale sharks
Due to overfishing and climate change, conservation efforts are increasing to protect this vital ecosystem.
Thus, the Ceram Sea is a vital yet underrated part of Indonesia’s maritime territory, offering stunning biodiversity, deep-sea mysteries, and adventure tourism potential.
