17. Shrimp
You’re not going to get your hands on these shrimp on your dinner plate any time soon. They’re so far down that it would be too expensive to trawl them back up to the surface. But there are a plethora of them around vents: at least 15 different species, with half of them living in the Atlantic and the other half in the Pacific.
You’ll find shrimp clustered around the black smokers that you find more often in the Atlantic Ocean. They’re also plagued with bacteria that they share a symbiotic relationship with to extract nutrients from the chemicals in the water.