Deep under the sea lurk invertebrates cooler than your average earthworm.
Photographer Alexander Semenov captures images of beautiful, mesmerizing worms underwater. The marine worms -- technically classified as polychaetes -- live everywhere from the freezing White Sea in northern Russia to the Great Barrier Reef in sunny Australia.
Semenov works as an underwater diver and head of the scientific divers team at White Sea Biological Station. When not studying the mysteries of the sea, he makes a serious hobby out of his underwater photography.
Some of the worms Semenov cataloged with his photography were previously undiscovered, and scientists have started the process of identifying them.
Imagine all the other undiscovered terrors living in the deep.
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