How many species of bacteria classified?

4000 species known, but over 3million presumed to be living on the earth 4000 species known, but over 3million presumed to be living on the earth

To put this question into perspective, recent estimates say that only 1% of the species of bacteria have been identified. So, a lot. Too many to count.

There are about 5000 species of Porifera.

Over one million species have been classified by Biologist..

So many species haven't been classified due to the lack of funding to buy the equipment to research these organisms. Since the rainforest and the deep ocean are difficult places to reach, there are...