Chimaera Fish
If you can fathom it, this was once the shark’s closest relative. Nowadays, these little fish are only found in very deep waters due to their branching off from the shark pool approximately 400 million years ago.
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Amphipod
No, its not a shrimp. This Amphipod has almost 10,000 cousin species that have be discovered to date and live in almost any aquatic environment but most remain marine environments as has been documented.