As per Hindu Puranas, Bhuloka or earth divided into sapta
dwipa or seven continents and the gap between these seven continents was filled
by the Sapta Sagara or Seven seas. The details regarding the Sapta Sagara are found
in the Skanda Purana and Bhagavad Purana. The liquid content of the seven seas
are different. The seven seas are made of saline water, milk, wine, curd, ghee,
sugarcane and sweet water.
The first island Jambudvipa is surrounded by saline water.
The second island is the Saka Dwipa and is surrounded by
Kshirasagara, the sea of milk.
The third island is the Pushkara Dwipa and is surrounded by
Surasagara, the sea of wine.
The fourth island is Kusha Dwipa surrounded by Dahi Sagara,
sea of curd
The fifth island is Kraunchadwipa surrounded by Ghrtasagara,
sea of ghee
The sixth island is Salma Dwipa surrounded by Ikshurasagara,
sea of sugarcane juice.
The seventh island is Gomeda Dwipa and is
surrounded by sweet water.