Table 5. Species richness in China seas by kilometer of coast.

Region or habitat	Species richness (species/100 km coastline)
Average of all China seas	123
Bohai Sea and Yellow Sea	60
East China Sea	149
South China Sea	247
Hainan Island	268
Xisha Islands	2,700 species/10 km coastline*
Nansha Islands	4,642/100 km (6,500 species/140 km coastline)

^*IOCAS studied less than 10 km of coastline in the Xisha Islands.