The great Barrier reef, stretching 1300 miles long along the North Eastern coast of Australia, is a brilliantly coloured under water kingdom. Crores of tiny coral polyps have created this mighty and colourful kingdom, which has withstood the force of the lashing waves for several centuries.
Less than half an inch long, the coral polyp is a close relative of jelly fish and sea anemones. It has a cylindrical body and a round disc on the top, with a row of stinging tentacles. The opening at the centre of the disc is the mouth. Any prey brushing against the tentacles gets paralyzed. It is swiftly drawn into the mouth and digested.
As the polyp matures, it secretes limestone to form a protective casing called “corallum”. Each polyp splits into identical polyps, which remain in contact with the parent, till they can form their own protective casings. The older polyps die and are covered by the corallum of their off springs. Thus extensive colonies of the polyps linked by the limestone casings are soon formed.
Only coral polyps living in the shallow and warm water can create coral reef. These polyps maintain a “symbiotic” relationship with algae called “zooxanthellae”. Any relationship between two or more different organisms in close association–which benefits all the organisms involved, is called a “symbiotic relationship”.
These single celled microscopic algae live inside the coral, probably helping its host with an increased supply of oxygen and faster waste disposal system. With the help of “the guest” algae, the polyps can grow ten times faster, than without the help of “the guest”.
Polyps need algae and the algae need sunlight to survive. So the most flourishing reefs are found between 15 feet and 90 feet under water. Rarely any coral is seen below the depth of 180 feet.
Isn’t it amazing that a tiny creature (less than half-an-inch in length) and a microscopic plant (invisible to human eye) have formed a successful relationship and given rise to the most colorful and impenetrable barrier under water!
Visalakshi Ramani
Pages
- A Prayer
- Why these Articles?
- I. THE FIRST OF ITS KIND!
- II. SPIRIT AND SUCCESS!
- III. LUCKY ACCIDENTS
- IV. FICTION AND FACTS
- V. NURSERY RHYMES
- #05. An Introduction
- 46. Ring a Ring o’ Roses
- 47. Mary Mary
- 48. Jack And Jill
- 49. Rain Rain Go Away
- 50. Sing a Song
- 51. London Bridge
- 52. Ding Dong Bell
- 53. For Want Of a Nail
- 54. Goosey Goosey
- 55. Hey Diddle Diddle
- 56. Little Miss Muffet
- 57. Old Mother
- 58. Little Tommy
- 59. Pussy Cat
- 60. Elephant Rhyme
- 61. An Apple a Day
- 62. A Wise Old Owl
- 63. Hot Cross Buns
- 64. Twinkle Twinkle
- 65. Wee Willie Winkie
- VI. DESERT BLOSSOMS
- VII. WONDERFUL BODY
- #07. An Introduction
- 76. The Human Aura
- 77. The Homunculus
- 78. Personalities
- 79. Brain Asymmetry!
- 80. “Use it or Lose it”
- 81. Why S.A.D?
- 82. Pain Gate Theory
- 83. A Rare Disorder!
- 84. A King’s Touch!
- 85. Is Fever a Favor?
- 86. Phytochemical Boosters
- 87. Why regain weight?
- 88. How do we see?
- 89. Tasty Bites!
- 90. “Feeling Left out”?
- 91. Artificial Blood
- 92. Artificial Skin!
- 93. Is Sleep a Luxury?
- 94. Aromatherapy
- 95. Garlic Pearls.
- VIII. MIRACULOUS MIND
- #08. An Introduction
- 96. Genius and Genes!
- 97. Anima and Animus
- 98. Body Language
- 99. Types of Thinking
- 100. Types of Intelligence
- 101. Memory Techniques
- 102. Types of Listening
- 103. Selective Listening
- 104. Commonest Phobia!
- 105. Agoraphobia
- 106. The Fear Of Size!
- 107. Dreamy Discoveries
- 108. Why do we day dream?
- 109. Brain Washing!
- 110. When we tell a lie…
- 111. Escapism
- 112. PSI Phenomena
- 113. Personal Space
- 114. Why Sensitive?
- 115. Drugs and Drinks!
- IX. MATHEMAGIC
- X. SCIENCE SPECIALS
- XI. UNUSUAL ANIMALS
- XII. FLIGHTLESS BIRDS
- XIII. INSECTS
- XIV. WATER KINGDOM
- XV. GENERAL INTEREST
- 182. Bloomer.
- 183. Joyful Jacuzzi
- 184. Laudable Lipogram
- 185. The Royal Car
- 186. A Taj Mahal in U.K!
- 187. Steady as a rock?
- 188. Holy Swastika defiled!
- 189. The King of Games!
- 190. Sky Writing!
- 191. Death defying jumps
- 192. Fresh Water at Sea
- 193. Milky Myths
- 194. Pride and Punishment
- 195. Nicotiana
- 196. Soothing Sleep
- 197. Silent Movies.
- 198. The Virus Day
- 199. Popeye’s Strength
- 200. The Ten-in-One man
- 201. Fertility and Eggs
- XVI. HOME SWEET HOME
- XVII. Some Useful Info
- 211. Anniversary gifts
- 212. Birth-month-gem
- 213. Birth-Month-Flower
- 214. The Scratch Test
- 215. Gems And Planets
- 216. Week Days And Gems.
- 217. Gems for Elements
- 218. The Seven Colors
- 219. Ruby
- 220. Natural Pearl
- 221. Red Coral
- 222. Emerald
- 223. Sapphire
- 224. Diamond
- 225. Blue Sapphire
- 226. Hessonite
- 227. Cat’s Eye
- 228. Alexandrite
- 229. Coin Collectors
- XVIII. Styles of Art
- CONCLUSION.
- Reviews