Helen Brierly shared her picture of marine life 'suspended in the inky blackness of the open ocean' (left) and Adriano Morettin from Italy said his image (right) was made using a double exposure technique performed directly in the camera without changing the lens

Gianni Colucci from Italy also captured seahorses. He said: 'During a night dive at around midnight, I found this pair of seahorses. I watched, mesmerised as they swam in the shallows holding each other by the tail. The scene was something majestic, a magic only enhanced by the beauty of the location, illuminated by the full moon'