فهذا الكائن له قدرة رهيبة على التجدد
فلو قمنا بتقطيعه إلى أجزاء بحيث يحتوي كل جزء على أحد الأذرع و جزء من القرص المركزي, فسيقوم هذا الجزء المقطوع بالتجدد و تكوين كائن كامل
و قد اكُشِفَت هذه الحقيقة عن طريق قصة ظريفة
فهذا الحيوان يتغذى على المحارات و كان يسبب ضررا هائلا لمزارع اللؤلؤ "حيث يتغذى على المحارات التي تكون اللؤلؤ" و لكي يتخلص منه المزارعون كانوا يأخذونه و يقطعونه ثم يلقون به في المياة مرة أخرى
و لكنهم لاحظوا أن الأعداد تزداد و من هنا اكتشفوا هذه الحقيقة و بدأ العلماء في دراستها
أترككم مع الصور لتتأملوا بديع خلق الله
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http://img13.imageshack.us/img13/2516/seastar100b1530.jpg (http://img13.imageshack.us/img13/2516/seastar100b1530.jpg)
(http://img13.imageshack.us/img13/4932/seastarandcrab100b1450.jpg)
الصور التالية توضح نجم البحر و هو يتغذى على المحارات
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لاحظوا التفاف الأذرع حول المحار بالرغم من كبر حجمه
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الصور التالية توضح ظاهرة التجدد في نجم البحر
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لاحظوا الفرق بين نجم البحر الكامل و ذلك الذي تم تقطيعه سابقا و كيف بدأت الأذرع في التجدد
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