15. Clams
No one thinks that clams would be so far down in the ocean, but it’s because of their hard shells that they’re able to survive such temperatures. Like mussels, they also cling to the vents, eating the bacteria that swarm around the hot waters.
How it works is that the bacteria cling to the clam’s gills and then use the chemical in the surrounding water to produce sugars. These sugars are what the clam uses for energy to move around with its single foot.