שונית האלמוגים – שיתופי פעולה מתחת למים

Posted on פברואר 26, 2023ינואר 30, 2024 by cobihay

מקור השם הלועזי של משפחת האלמוגים – "Anthozoa" מעיד על המאפיין הבולט ביותר שלהם. משמעות המילה ביוונית היא "פרחים חיים" ואכן, מדובר בצורות חיים צבעוניות להדהים ומגוונות להדהים, אשר מציגות תחרות עזה, גם לפרחים היפים ביותר בגן. צלילה או שנירקול בשונית האלמוגים תגלה את איזור המחיה השופע והצפוף ביותר בעולם. אלמוגים, אשר חיים בדרך כל […]

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בעלי חיים, בלוג

דוב הקוטב

Posted on פברואר 25, 2023ינואר 30, 2024 by cobihay

החורף בישראל מהסס ובנתיים, קצת צפונה מאיתנו, בחוג הארקטי, חי לו הטורף היבשתי הגדול ביותר בעולם – דוב הקוטב. פרוותו החלולה שקופה למחצה ומרחוק, היא נראית בצבע לבן או בז', אשר העניק לו את השם "הדוב הלבן" בחלק גדול מהשפות בעולם. שכבת השומן העבה שלהם והפרווה הייחודית מגינות עליהם מפני הקור העז השורר באיזור המחייה […]

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