Check out this brief video by Memukhin Oleg, where CGI fish react to the movements of a hand-powered submarine. The fish exhibit cohesion, separation and alignment, obstacle avoidance and flight behaviour.
An Australian freediver has described as "a rush", the feeling of a 150kg stingray nibbling his head while filming a documentary.
Researchers have discovered what is possibly only the second specimen ever found of the small and very rare 'Pocket shark'.
Britain's biggest selling and best fishkeeping magazine is now available to download on the iPad.
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