{"id":9937,"date":"2025-02-05T09:55:20","date_gmt":"2025-02-05T09:55:20","guid":{"rendered":"https:\/\/hurghada-today.com\/?p=9937"},"modified":"2025-10-26T09:48:33","modified_gmt":"2025-10-26T09:48:33","slug":"coral-predator-crown-of-thorns-starfish","status":"publish","type":"post","link":"https:\/\/hurghada-today.com\/fr\/coral-predator-crown-of-thorns-starfish\/","title":{"rendered":"Pr\u00e9dateur de corail, \u00e9toile de mer couronne d&#039;\u00e9pines"},"content":{"rendered":"<p>L\u2019\u00e9toile de mer couronne d\u2019\u00e9pines (Acanthaster planci) est l\u2019une des cr\u00e9atures marines les plus tristement c\u00e9l\u00e8bres. Reconnaissable \u00e0 son aspect \u00e9pineux et \u00e0 son app\u00e9tit pour le corail, elle joue un r\u00f4le controvers\u00e9 dans les \u00e9cosyst\u00e8mes r\u00e9cifaux. <!--more-->Bien qu&#039;on la trouve le plus souvent dans la r\u00e9gion australienne, on peut \u00e9galement l&#039;observer dans d&#039;autres mers, notamment la mer Rouge. Lors de leurs plong\u00e9es quotidiennes, les plongeurs <strong>Jetez cette \u00e9toile de mer hors de la mer<\/strong>, bien que l&#039;extraction d&#039;autres esp\u00e8ces de faune et de flore soit interdite. Aujourd&#039;hui, gr\u00e2ce aux experts de <a href=\"https:\/\/hurghada-today.com\/fr\/\">Agence Hurghada Today<\/a>Vous ferez la connaissance de cette cr\u00e9ature marine.<\/p>\n<h2>Caract\u00e9ristiques distinctives de l&#039;\u00e9toile de mer couronne d&#039;\u00e9pines<\/h2>\n<p>Cette \u00e9toile de mer doit son nom \u00e0 ses \u00e9pines venimeuses, qui ressemblent \u00e0 une couronne d&#039;\u00e9pines. Elle peut atteindre 35 cm de diam\u00e8tre et compte de 16 \u00e0 23 bras. Comme la plupart des esp\u00e8ces dangereuses, elle arbore des couleurs \u00e9clatantes allant du rouge et du violet au vert et au brun.<\/p>\n<figure id=\"attachment_9953\" aria-describedby=\"caption-attachment-9953\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-9953 size-large\" src=\"https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-3-1024x768.jpg\" alt=\"Crown-of-thorns starfish\" width=\"1024\" height=\"768\" srcset=\"https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-3-1024x768.jpg 1024w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-3-300x225.jpg 300w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-3-768x576.jpg 768w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-3-16x12.jpg 16w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-3.jpg 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-9953\" class=\"wp-caption-text\">Esp\u00e8ces remarquables mais difficiles \u00e0 g\u00e9rer dans les \u00e9cosyst\u00e8mes marins<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<h3>Habitat et r\u00e9gime alimentaire<\/h3>\n<p>L&#039;\u00e9toile de mer couronne d&#039;\u00e9pines pr\u00e9f\u00e8re les eaux chaudes et vit donc dans les r\u00e9cifs coralliens de toute la r\u00e9gion indo-pacifique. Elle est commune dans la Grande Barri\u00e8re de corail, <a href=\"https:\/\/hurghada-today.com\/fr\/tour\/diving\/\">mer Rouge<\/a>et les \u00eeles tropicales du Pacifique. On les trouve \u00e0 des profondeurs de 1 \u00e0 30 m\u00e8tres. <em>L&#039;\u00e9toile de mer se nourrit principalement de polypes coralliens vivants.<\/em>Elle utilise son estomac pour dig\u00e9rer le corail de l&#039;ext\u00e9rieur, ne laissant derri\u00e8re elle qu&#039;un squelette blanc et nu. Une seule \u00e9toile de mer peut consommer jusqu&#039;\u00e0 10 m\u00e8tres carr\u00e9s de corail par an. Elle se d\u00e9place lentement gr\u00e2ce \u00e0 ses podia. Bien qu&#039;elle ne migre pas sur de longues distances, elle peut se disperser \u00e0 la recherche de nourriture, notamment lors des prolif\u00e9rations.<\/p>\n<h3>Comportement reproductif et strat\u00e9gies d&#039;accouplement de l&#039;\u00e9toile de mer couronne d&#039;\u00e9pines<\/h3>\n<p>Ces \u00e9toiles de mer se reproduisent abondamment. Elles se reproduisent en lib\u00e9rant des \u0153ufs et du sperme dans l&#039;eau \u00e0 des saisons sp\u00e9cifiques. <strong>Une seule femelle peut produire des millions d&#039;\u0153ufs<\/strong> Lors d&#039;une seule ponte, les \u0153ufs f\u00e9cond\u00e9s se d\u00e9veloppent en larves qui d\u00e9rivent au gr\u00e9 des courants avant de se fixer sur le r\u00e9cif. Dans certaines conditions, les populations d&#039;acanthasters explosent. Cela se produit souvent lorsque la qualit\u00e9 de l&#039;eau se d\u00e9grade ou que les pr\u00e9dateurs disparaissent. Lors de ces prolif\u00e9rations, elles peuvent <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3497744\/\">d\u00e9vaster les r\u00e9cifs coralliens<\/a>, en consommant de grandes quantit\u00e9s et en causant des dommages \u00e0 long terme.<\/p>\n<figure id=\"attachment_9951\" aria-describedby=\"caption-attachment-9951\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-9951 size-large\" src=\"https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-1-1024x768.jpg\" alt=\"\" width=\"1024\" height=\"768\" srcset=\"https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-1-1024x768.jpg 1024w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-1-300x225.jpg 300w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-1-768x576.jpg 768w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-1-16x12.jpg 16w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-1.jpg 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-9951\" class=\"wp-caption-text\">\u00c9toile de mer couronne d&#039;\u00e9pines sur un r\u00e9cif corallien<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<h2>Faits int\u00e9ressants sur cette \u00e9toile de mer<\/h2>\n<p>Voici quelques faits fascinants sur l&#039;\u00e9toile de mer couronne d&#039;\u00e9pines\u00a0:<\/p>\n<p>1. Comme beaucoup d&#039;autres \u00e9toiles de mer, elles peuvent r\u00e9g\u00e9n\u00e9rer leurs bras perdus. Si une partie du disque central est encore attach\u00e9e, un seul bras peut donner naissance \u00e0 une nouvelle \u00e9toile de mer.<\/p>\n<p>2. Lors de la ponte, une seule \u00e9toile de mer femelle Couronne d&#039;\u00e9pines peut lib\u00e9rer jusqu&#039;\u00e0 60 millions d&#039;\u0153ufs au cours d&#039;une seule saison de reproduction.<\/p>\n<p>3. Ils sont principalement actifs la nuit, utilisant leurs pieds ambulacraires pour se d\u00e9placer sur les r\u00e9cifs.<\/p>\n<p>4. Malgr\u00e9 leurs d\u00e9fenses, ils ont des pr\u00e9dateurs naturels, tels que l&#039;escargot g\u00e9ant triton, la crevette arlequin et certaines esp\u00e8ces de poissons.<\/p>\n<p>5. Leurs \u00e9pines contiennent une substance toxique, la saponine, qui dissuade de nombreux pr\u00e9dateurs potentiels.<\/p>\n<p>Ces \u00e9toiles de mer constituent une esp\u00e8ce remarquable mais aussi complexe \u00e0 g\u00e9rer dans les \u00e9cosyst\u00e8mes marins.<\/p>\n<figure id=\"attachment_9952\" aria-describedby=\"caption-attachment-9952\" style=\"width: 765px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-9952 size-large\" src=\"https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-2-765x1024.jpg\" alt=\"Interesting facts about this starfish\" width=\"765\" height=\"1024\" srcset=\"https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-2-765x1024.jpg 765w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-2-224x300.jpg 224w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-2-768x1028.jpg 768w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-2-1147x1536.jpg 1147w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-2-9x12.jpg 9w, https:\/\/hurghada-today.com\/wp-content\/uploads\/2025\/01\/Hurghada-Today_Crown-of-thorns-starfish-2.jpg 1440w\" sizes=\"auto, (max-width: 765px) 100vw, 765px\" \/><figcaption id=\"caption-attachment-9952\" class=\"wp-caption-text\">La hausse des temp\u00e9ratures marines et la pollution pourraient aggraver leur croissance d\u00e9mographique<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<h2>Faut-il l&#039;exterminer ?<\/h2>\n<p>La gestion des prolif\u00e9rations d&#039;\u00e9toiles de mer acanthasters est cruciale pour la sant\u00e9 des r\u00e9cifs. Les efforts d\u00e9ploy\u00e9s comprennent le retrait manuel des \u00e9toiles de mer ou leur injection d&#039;une solution l\u00e9tale. La protection contre les pr\u00e9dateurs et l&#039;am\u00e9lioration de la qualit\u00e9 de l&#039;eau contribuent \u00e9galement \u00e0 contr\u00f4ler leurs populations. Cependant, malgr\u00e9 leur nature destructrice, <strong>Les \u00e9toiles de mer couronne d&#039;\u00e9pines jouent un r\u00f4le dans les \u00e9cosyst\u00e8mes r\u00e9cifaux.<\/strong>En consommant les coraux dominants, elles cr\u00e9ent de l&#039;espace pour la croissance d&#039;autres esp\u00e8ces. Cet \u00e9quilibre est crucial, car les prolif\u00e9rations peuvent submerger les r\u00e9cifs. Par cons\u00e9quent, comprendre et g\u00e9rer leur impact est essentiel \u00e0 la conservation des r\u00e9cifs coralliens dans le monde entier.<\/p>","protected":false},"excerpt":{"rendered":"<p>L\u2019\u00e9toile de mer couronne d\u2019\u00e9pines (Acanthaster planci) est l\u2019une des cr\u00e9atures marines les plus tristement c\u00e9l\u00e8bres. Reconnaissable \u00e0 son aspect \u00e9pineux et \u00e0 son app\u00e9tit pour le corail, elle joue un r\u00f4le controvers\u00e9 dans les \u00e9cosyst\u00e8mes r\u00e9cifaux.<\/p>","protected":false},"author":4,"featured_media":9953,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[117,152],"tags":[156,116,153,115,154,114,155],"class_list":["post-9937","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-marine-flora-and-fauna","tag-diving-in-hurghada","tag-egypt","tag-giftun-island","tag-hurghada","tag-orange-bay","tag-sea-trips","tag-snorkeling"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Coral Predator, Crown-of-Thorns Starfish | Hurghada today<\/title>\n<meta name=\"description\" content=\"Crown-of-Thorns 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