They have been found in hot springs, sulfur pools, and thermal ocean vents.
But little is known about how and when some of these crustaceans made it to the deep ocean vents.
It was designed with versatility in mind, and its remote sensing equipment could just as easily explore an underwater city as a field of hypothermal ocean vents.
This made Canada the first country to formally take measures to protect and conserve deep ocean hydrothermal vents.
Like the heat-loving microbes of Earth's deep ocean vents, these had been creatures that had once swum in a hot, salty ocean of water.
This was confirmed nearly 90 years later, when hydrothermal ocean vents were predicted to exist in 1970s.
High temperature habitats such as hot oceans, hot springs and deep ocean thermal vents would have occurred widely in the early Archaean eon (from 3.9 billion years ago).
Scientists have found life flourishing on Earth, on icecaps, hot springs and deep ocean vents, under conditions presumably less hospitable than those on Mars.
While he absorbed that, another part of his mind continued to read the ventling caption; how their biochemistry had many similarities with the gutless tube worms which lived around Earth's ocean vents.
Science C1-12 What secrets lurk in mounds around deep ocean vents?