True blue: A Polychaete marine worm that is made up of segments and displays a startling blue flash.
Sonic hedgehog of the seas: This is a nudibranch – which is a shell-less marine mollusc.
A cousin to coral: The tentacled feeding structures of a Hydrozoan, which is related to corals and sea anemones.
Meet the neighbours: Amphipod crustaceans shelter amongst the tentacled feeding structures of a hydrozoan colony.
Sandworms: These marine worms move through the water suing their bristles.
A marine worm fluorescing: Polychaetes are a class of annelid (segmented) worms. Each segment has a pair of fleshy limb-like appendages (parapodia) which help them to move.
Sea butterfly: A swimming predatory marine sea snail. They have two wing-like outgrowths (lower right) derived from their foot, which they continually flap to swim through the water.
Sea angel: A small swimming sea slug makes it way through the -2C waters.
Up close and personal: A skeleton shrimp shows its pincers and antennae. It most likely male because of its elongated head.
Give us a kiss: A Ragworm showing its mouthparts. They are marine annelid worms that burrow in wet sand and mud using parapodia (limb-like outgrowths).
Many would assume that the icy depths of the sea off the northwestern coast on Russia would have little to offer nature photographers.
But one man has braved the freezing elements to capture the beautiful monsters of the deep who display a surprising variety of colourful speices..
Marine biologist Alexander Semenov spent two years in the hostile environment at the ultra-remote White Sea Biological Station to create his bizarre collection of images.
The lead undetwater photographer breaks through arctic sea ice dropping into -2degree water from a -30 degree world above.
He has documented striking differences between these species who have evolved cut off from their cousins that live in warmer waters elsewhere in the world.
Included in his works are the bright pink skeleton shrimp, the weird sea angel, and the odd sea butterfly – a type of snail that spins a web to capture small creatures.