Would your child ever forgive you if all the clown fish died? There were no more playful red crabs? And the migrating turtles that lay their eggs on the same beach as they were born on, ceased to exist? Did you know that parrot fish aren't just a kaleidoscope of colour; they actually use their beak to recycle dead coral into thousands of tonnes of sand. When you see the fire-works on the ocean surface light up with its own glittery phosphorescence...