According to http://www.isimangaliso.com

Lake St Lucia is Africa’s largest estuary
The greatest congregation of hippo and crocodiles in South Africa The last significant breeding ground for the giant leatherback and loggerhead turtles
8 interlinking ecosystems
3 major lake systems
350 kms of water surface
220 kms of coastline and beaches
190 kms of marine reserve
100 species of coral
1 200 species of fish
25 000 year old coastal dunes
700 years of traditional fish traps
36 snake species
80 dragonfly species
110 butterfly species
526 bird species