The city known as the Living Reef was created as a haven for those wishing to escape the turmoil of the world by the sea goddess Ki. Built upon the back of a great whale, Sihajja is enclosed by a protective barrier keeping the inhabitants dry while the city's beast of burden is submerged. The streets are paved with the same dark stone found in Gaharee, and many of their religious paraphernalia bear the same geometric designs.

The structure of Sihajja's streets emulate the formation of coral reefs. Tall structures reach upward and branch out creating building complexes. The limestone buildings come in many colors, with accents of mother-of-pearl and marble. Only the most important buildings are adorned with lapis lazuli and gold.

The population is a blend of many cultures from a time before the Parvporan world tree fell. However as time passed, their language and customs evolved in isolation. The people here hold a great reverence for the fallen sea goddess, as this was her gift to them.

The entire city is self-sufficient, and most of the materials used in everyday life come from the sea. The elders taught the people to revere and protect the sea just as the late goddess did for their ancestors. On the fringes of the city, a hedge of growing coral colonies helps camouflage and protect Sihajja's outer reaches.

The people of the city hold the whale as a symbol of their religious beliefs, and strange songs are sung every hour by the Seers of the Deep. These songs echo throughout the city and are known as 'whale songs', their purpose akin to vocalized prayers and blessings over all who live in Sihajja.