Top 5 BIGGEST Animal Mysteries EVER
The Top 5 Biggest Gigantic Animal Mysteries in the world / earth include a modern day Kraken bigger than the colossal squid, the biggest snake ever at an estimated 200 ft., a possible Megalodon, a massive dinosaur like lizard known as the Megalania that roams Australia, and more.
Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago. Animals are divided into various sub-groups, some of which are: vertebrates ; molluscs ; arthropods ; annelids ; sponges; and jellyfish. (source : wikipedia