No one knows how many undiscovered species live in the sea or on land..in 2016 18,000 new species were discovered ....how many that equates to over one hundred years is quite impossible to say..... Humans activity on this planet must be responsible for destroying so many different life forms though...
I watched a documentary where scientists in Central America gassed trees and shook them to see what kind of creatures came out. They found many new species of insects and spiders, but I wondered if the gassing of them killed them. They didn't say.
I watched that maybe two years ago...... They just don't know what lives up in the canopy three or four hundred feet up......it's virtually impossible to reach .........It's such a crime that they are destroying so much of the rain Forrest... It will surly seriously effect to world one day .......