Either it’s a typo, or I have a bunch of unknown species in my backyard.
>Using an underwater robot, the science team overturned chunks of volcanic crust, discovering cave systems teeming with worms, snails, and chemosynthetic bacteria living in 75 degrees Fahrenheit (25 degrees Celsius) water.
The article is somewhat confusing but I think the surprising thing is that the ecosystem includes species that are known to be extremophiles that are part of vent ecosystems that have very different conditions than the newly-discovered below-the-vents ecosystems, and which it was previously unknown how they arrived at new vents, almost immediately when the vents form.