{"id":399291,"date":"2026-06-08T10:07:34","date_gmt":"2026-06-08T09:07:34","guid":{"rendered":"https:\/\/www.webdo.tn\/fr\/?p=399291"},"modified":"2026-06-08T10:07:36","modified_gmt":"2026-06-08T09:07:36","slug":"une-meduse-inhabituelle-reperee-au-large-des-cotes-tunisiennes","status":"publish","type":"post","link":"https:\/\/www.webdo.tn\/fr\/actualite\/national\/une-meduse-inhabituelle-reperee-au-large-des-cotes-tunisiennes\/399291\/","title":{"rendered":"Une m\u00e9duse inhabituelle rep\u00e9r\u00e9e au large des c\u00f4tes tunisiennes"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>L\u2019association tunisienne de sciences participatives \u00ab Tounsi \u00bb a annonc\u00e9 l\u2019observation de la m\u00e9duse boussole (Chrysaora hysoscella) sur les c\u00f4tes tunisiennes. Rarement signal\u00e9e dans les eaux du pays, cette esp\u00e8ce m\u00e9diterran\u00e9enne ne constitue pas un ph\u00e9nom\u00e8ne exceptionnel, mais sa pr\u00e9sence suscite l\u2019int\u00e9r\u00eat des chercheurs qui y voient une occasion de mieux suivre l\u2019\u00e9volution de la biodiversit\u00e9 marine.<\/strong><\/p>\n\n\n\n<h2 id=\"h-une-espece-facilement-reconnaissable\" class=\"wp-block-heading\">Une esp\u00e8ce facilement reconnaissable<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La m\u00e9duse boussole doit son nom aux motifs brun\u00e2tres en forme de rayons qui ornent son ombrelle et rappellent les points cardinaux d\u2019une boussole. Elle se distingue \u00e9galement par ses longs tentacules urticants utilis\u00e9s pour capturer ses proies, compos\u00e9es principalement de zooplancton, de larves et de petits poissons.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Son diam\u00e8tre varie g\u00e9n\u00e9ralement entre 10 et 30 centim\u00e8tres, mais certains sp\u00e9cimens peuvent exceptionnellement atteindre jusqu\u2019\u00e0 60 centim\u00e8tres. Sa coloration oscille entre le jaune p\u00e2le et le brun, avec des marques rayonnantes particuli\u00e8rement visibles.<\/p>\n\n\n\n<h2 id=\"h-une-presence-inhabituelle-mais-naturelle\" class=\"wp-block-heading\">Une pr\u00e9sence inhabituelle mais naturelle<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Selon l\u2019association, l\u2019apparition de cette m\u00e9duse sur les c\u00f4tes tunisiennes reste un ph\u00e9nom\u00e8ne naturel. Les variations des courants marins, des temp\u00e9ratures de l\u2019eau et des conditions climatiques peuvent favoriser le d\u00e9placement de certaines esp\u00e8ces vers de nouvelles zones ou accro\u00eetre leur visibilit\u00e9 pr\u00e8s du littoral.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La m\u00e9duse boussole est largement r\u00e9pandue dans plusieurs r\u00e9gions m\u00e9diterran\u00e9ennes et atlantiques, notamment sur les c\u00f4tes espagnoles, fran\u00e7aises, italiennes et grecques, ainsi que dans certaines zones de l\u2019Atlantique Nord-Est.<\/p>\n\n\n\n<h2 id=\"h-une-piqure-douloureuse-mais-peu-dangereuse\" class=\"wp-block-heading\">Une piq\u00fbre douloureuse mais peu dangereuse<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Si ses tentacules sont urticants, la m\u00e9duse boussole est consid\u00e9r\u00e9e comme moins dangereuse que la m\u00e9duse violette (Pelagia noctiluca), esp\u00e8ce fr\u00e9quemment observ\u00e9e sur les plages tunisiennes. Son contact peut toutefois provoquer des br\u00fblures, des rougeurs, des douleurs localis\u00e9es ou de l\u00e9gers gonflements, dont l\u2019intensit\u00e9 varie selon la sensibilit\u00e9 des personnes touch\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les sp\u00e9cialistes recommandent, en cas de piq\u00fbre, de rincer la zone avec de l\u2019eau de mer plut\u00f4t qu\u2019avec de l\u2019eau douce et de retirer avec pr\u00e9caution les \u00e9ventuels fragments de tentacules rest\u00e9s sur la peau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019association \u00ab Tounsi \u00bb invite les citoyens qui aper\u00e7oivent cette esp\u00e8ce \u00e0 la photographier et \u00e0 noter le lieu, la date ainsi qu\u2019une estimation de sa taille. Ces informations peuvent contribuer au travail des chercheurs charg\u00e9s du suivi de la biodiversit\u00e9 marine et de la surveillance de l\u2019apparition d\u2019esp\u00e8ces rares ou nouvelles dans les eaux tunisiennes.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Lire aussi :<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-medium-font-size\"><a href=\"https:\/\/www.webdo.tn\/fr\/actualite\/national\/mediterranee-envahie-les-meduses-arrivent-en-masse-la-tunisie-nest-pas-epargnee\/380755\/\">M\u00e9diterran\u00e9e envahie ? Les m\u00e9duses arrivent en masse, la Tunisie n\u2019est pas \u00e9pargn\u00e9e<\/a><\/li>\n<\/ul>\n<\/blockquote>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>L\u2019association tunisienne de sciences participatives \u00ab Tounsi \u00bb a annonc\u00e9 l\u2019observation de la m\u00e9duse boussole (Chrysaora hysoscella) sur les c\u00f4tes tunisiennes. Rarement signal\u00e9e dans les eaux du pays, cette esp\u00e8ce m\u00e9diterran\u00e9enne ne constitue pas un ph\u00e9nom\u00e8ne exceptionnel, mais sa pr\u00e9sence suscite l\u2019int\u00e9r\u00eat des chercheurs qui y voient une occasion de mieux suivre l\u2019\u00e9volution de la [&hellip;]<\/p>\n","protected":false},"author":4782,"featured_media":399292,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44],"tags":[3799,14311,12046,3745,2608],"class_list":["post-399291","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-national","tag-mediterranee","tag-meduse-boussole","tag-meduses","tag-plages","tag-tunisie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Une m\u00e9duse inhabituelle rep\u00e9r\u00e9e au large des c\u00f4tes tunisiennes - 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