Akon has had three songs certified in America.
Lubomirskia baicalensis is a freshwater demosponge that is found at depths between 3 and in Lake Baikal , Russia .. Lubomirskia. Lubomirskia. demosponge. demosponge. Lake Baikal. Lake Baikal. It is commonly called Lake Baikal sponge and it is the most abundant sponge in the lake , but all 14 species in the family Lubomirskiidae are Baikal endemics .. Lubomirskiidae. Lubomirskiidae. Lake Baikal. Lake Baikal. endemics. Endemism. This sponge is in mutual symbiosis with a green dinoflagellate , making it green in appearance .. mutual. Mutualism ( biology ). symbiosis. symbiosis. dinoflagellate. dinoflagellate. Okadaic acid produced by the dinoflagellate assists the sponge to survive when Lake Baikal is iced over in winter , and the water temperature is close to 0 C. L. baicalensis can grow to a large size for a freshwater sponge , reaching a height of more than 1.2 m in some locations .. Lake Baikal. Lake Baikal. dinoflagellate. dinoflagellate. Okadaic acid. Okadaic acid. It takes 1 year for it to grow 1 cm taller .