These ancient creatures look both gorgeous and freaky at the same time. They have been around for more than 700 million years and are truly among the oldest creatures on Earth. They have tentacle-like appendages called ‘combs’ that are used for swimming. As they move, Ctenophores reflect light in a peculiar and beautiful way, creating gorgeous rainbows all around them.
Only 6 species of Nautilus remain today, out of hundreds that used to inhabit the oceans. Nautilus has an incredible shell that works as a submarine and has chambers that can be filled with water or gas when the creature needs to go deeper or ascend. Apart from ‘driving’ the very first ‘submarine’ that’s ever been invented, these creatures haven’t really changed at all during the past 500 million years or so.