Underwater photographer Alexander Semenovs has snapped some of the most stunning, fragile life forms anywhere on planet Earth. Shot in deep, dark conditions, the images continue to provide an insight into what lies beneath, with glowing creatures appearing a lot like aliens in the pitch-black water. Semenovs has shot the likes of bioluminescent jellyfish, aggressive-looking worms and many species that leave a lot to the imagination. The 30-year-old from Moscow does the majority of his work in the White Sea, near the Arctic Circle. Here: a Sea slug – Tochuina tetraquetra. (Photo by Alexander Semenovs/Caters News)





A Pycnogonidae – Sea spider. (Photo by Alexander Semenovs/Caters News)





A Scyphozoan jellyfish – Lions mane jellyfish. (Photo by Alexander Semenovs/Caters News)





King Ragworm – Nereis pelagica. (Photo by Alexander Semenovs/Caters News)





A Hydrozoan jellyfish – Eutonina indicans. (Photo by Alexander Semenovs/Caters News)





A Hydrozoan jellyfish. (Photo by Alexander Semenovs/Caters News)





King Ragworm – Nereis pelagica. (Photo by Alexander Semenovs/Caters News)





A Polychaete Terebellidae. (Photo by Alexander Semenovs/Caters News)





A Comb jelly – Beroe cucumis. (Photo by Alexander Semenovs/Caters News)





A Pteropod mollusk – Sea angel. (Photo by Alexander Semenovs/Caters News)





A Ctenophora – Cestum veneris. (Photo by Alexander Semenovs/Caters News)





A Scyphozoan jellyfish – Lions mane jellyfish. (Photo by Alexander Semenovs/Caters News)