Whitetip sharks use their electrical sense to Moray eels slither around the corals hunting by smell. The only protectionĪ coral can hope for is a small crab which takes up residence in the coral's branches and uses its pincers to nip the starfish to see it This soft sand forms beautiful tropical white beaches and eventually creates tropical islands!Ī sinister crown of thorns starfish slides on to a coral, spreads its stomach over the polyps and digests them whole. On a single reef they can produce tonnes of sand every year. These fish erode the coral and the material they swallow comes out the other end as fine sand. Overcrowding follows as corals expand and soon they're fighting - digesting their neighbours alive under cover of darkness.Ĭorals are protected by a hard, limestone skeleton, but bumphead parrot fish bite straight through rock and coral with their powerful jaws. A tiny algae that lives in its tissues allows the coral to grow night and day and as more corals settle, a reef develops. Soon it's a coral head, cemented and secure on Life on a coral reef starts with one coral larva which lands in the right place and grows. Ironically, the strict preservation of Blue Peter’s history means that the clip of the first regeneration has been preserved, but the final episode of The Tenth Planet that it came from was never again seen after its use here.DVD BBC The Blue Planet Disc 3: Coral Seas (2002) BBC The Blue Planet Disc 3: Coral Seas (2002) Blue Peter: Doctor Who's Tenth Anniversary - Two weeks before the show’s tenth anniversary, the Blue Peter team take a look back at Doctor Who’s history.With actors William Russell, Elisabeth Sladen, Louise Jameson, Nicola Bryant and Arthur Darvill, writers Nev Fountain and Joseph Lidster, and psychologist Dr Tomas Charmorro-Premuzic. Companion Piece - A psychologist, writers and some of the Doctor’s companions over the years examine what it means to be a Time Lord’s fellow traveller.Boys! Boys! Boys! - Peter Purves, Frazer Hines and Mark Strickson reminisce about their time as companions to the First, Second and Fifth Doctors respectively.
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