Blue Planet II
natural World / 8.00pm / BBC1
sir david attenborough turns his attention to the creatures living on bustling coral reefs. One of our favourite sequences sees a turtle having a spa day, lying back blissfully while smaller fish kindly remove its dead skin and parasites. Meanwhile, a cute saddleback clownfish has to drag a coconut shell along the seabed to give his mate a safe place to lay her eggs. Competition for food is fierce on the reef and, while a broadclub cuttlefish changes its skin pattern repeatedly to hypnotise its prey, a canny coral grouper teams up with an octopus to nab a meal. More worryingly, the episode also looks at how rising temperatures are causing an increase in coral bleaching.
Life on the reef for sea goldie and
a green turtle