Surreal pictures of nocturnal sea creatures offer a rare glimpse of how life under sea changes when the sun goes down.
Home to an exotic array of colourful fish during the day, the azure-blue waters around the islands of the Philippines are a popular hotspot for scuba divers.
But when the sun goes down the waters are filled with a range of nocturnal sea creatures – witnessed only by brave night divers.
Underwater photographer Andrey Nekrasov, 42, dived down to the inky depths to photograph the strange sub-aquatic creatures.
Mr Nekrasov, of Odessa, Ukraine, said: “I am always curious to see who I get to meet at night.
“Most of the creatures I photograph at night are hiding during the day. The ones who can be found during the day usually behave differently at night.”
Mr Nekrasov dived to a depth of 16 metres for an hour at a time. He conducted his night dives around the islands of Mactan, Malapascua as well as around Bohol and Cebu.
While diving, in October this year, Mr Nekrasov came face-to-face with bigfin reef squid, pink skunk clownfish, black-spotted pufferfish and barred-fin moray eels.
Mr Nekrasov said: “Night diving is an unusual feeling. You are in complete silence, I could only hear the sound of my own breathing and I could only see what was in front of my flashlight beam.
“Night diving is like being in zero gravity.”
Bigfin reef squid are often attracted to divers’ lights at night. The curious creatures can control their rapidly-changing body colours which they use to attract mates.
The process which allows the 30cm-long squid to change colour is called metachrosis.
The squid can voluntarily control their chromatophores which allows them to rapidly cycle through a variety of bright metallic colours and patterns.
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