Of course the earth is flat

Sponge color correct

Sponges are animals of the phylum Porifera (Pore bearer) (pronounced /pɒˈrɪfərə/). Their bodies consist of jelly-like mesohyl sandwiched between two thin layers of cells... en.wikipedia.org

 

Discovery of ancient sea sponge fossils could push back existence of animal life on Earth by 90 million years | Daily mail

The fossilised remains of sea sponges dating back 650million years has been found in south Australia

"Scientists have discovered the ancient fossils of sea sponges which could push back the existence of animal life on Earth by 90 million years..."

Article by Wil Longbottom   dailymail.co.uk

 100,000        years ago:  Homo sapiens emerge
 65,000,000  years ago:   Dinosaurs are made extinct
 240,000,000 years ago: Trilobites become extinct
 550,000,000 years ago: The oldest hard-bodied animals (Namacalathus and Cloudina) lived
 650,000,000 years ago: Primitive sea sponges lived?