Protozoa (kingdom Protoctista) A phylum (division) of eukaryotic, single-celled micro-organisms which show a wide variety of forms. The phylum includes some plant-like forms and animal species that are free-living, commensal, mutualistic, and parasitic, and some important disease-causing organisms.
Lake Baikal in Siberia, Russia (Asia), is the world's deepest fresh water lake at 1,638 metres deep. It is 636 km long and is the world's sixth largest lake and 1,181 metr â¦ es of it is below sea level. It contains 20% of the world's fresh water which is so clear that divers suffer from vertigo.
Caspian Sea and Lake Baikal. Lakes are defined as considerable inland bodies of freshwater. The Caspian Sea is considered by scholars to be the largest lake in the world. Ho â¦ wever, it has a salinity about one third of the oceans. The black sea is sometimes considered to be a lake but its salinity is about 60 percent of the oceans. Lake Baikal has more water volume than all of the great lakes combined.