Dive like a secret agent, colourful shoals of fish swim past, corals shimmer in the distance, while you enjoy the endless tranquility and discover the whimsical beauty of an unknown underwater world.

像特工一般潜水，五颜六色的鱼群从身边游过，珊瑚在远处微微发光，你享受着无穷无尽的静谧，探索着不为人知的水下世界神秘梦幻的美。

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More than 200 people have signed up to learn to dive at a Luton swimming pool in the past month.

BBC: Tom Daley's Splash! inspires divers in Luton

For the past six weeks, Cal Dive has been in a new uptrend, after pulling back more than 12% in October.

FORBES: Cal Dive Goes Deep For Energy