They include strange purple orbs, "mud monsters" and a bizarre swimming sea cucumber reminiscent of a flying Mary Poppins.
Another voyage found around 500 new undersea methane vents off the US west coast.
This doubles the number of known seeps, bubbling up a powerful greenhouse gas.
The gas vents were found by an expedition mounted by Dr Robert Ballard, the man who first located the wreck of the Titanic.read more
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