{"id":3421,"date":"2014-12-12T12:08:47","date_gmt":"2014-12-12T12:08:47","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=3421"},"modified":"2026-03-19T10:38:21","modified_gmt":"2026-03-19T10:38:21","slug":"fakta-om-valhajar","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/se\/facts-about-whale-sharks","title":{"rendered":"Fakta om valhajar"},"content":{"rendered":"<ol>\n<li><strong>Namn:<\/strong>\u00a0Valhajens namn kommer fr\u00e5n dess enorma storlek (en haj som \u00e4r lika stor som en val = valhaj). Dess latinska namn \u00e4r Rhincodon typus<\/li>\n<li><strong>V\u00e4rldens st\u00f6rsta fisk:<\/strong>\u00a0Valhajen \u00e4r den st\u00f6rsta <a href=\"https:\/\/www.123fakta.com\/se\/fakta-om-fisk\/\">fisk<\/a> i v\u00e4rlden. Den st\u00f6rsta registrerade valhajen var 12,65 meter l\u00e5ng och v\u00e4gde 21,5 ton (Karachi, Pakistan 1947). Det finns ber\u00e4ttelser om valhajar p\u00e5 \u00f6ver 18 meter med en minimivikt p\u00e5 45 ton. Den genomsnittliga valhajen \u00e4r 9,7 meter l\u00e5ng och v\u00e4ger ca 9 ton.<\/li>\n<li><strong>Mat:<\/strong>\u00a0Valhajar \u00e4r s\u00e5 kallade \"filtrerare\" som filtrerar sin f\u00f6da fr\u00e5n vattnet. Processen sker genom att enorma m\u00e4ngder vatten kommer in i munnen och rinner ut genom g\u00e4larna. P\u00e5 v\u00e4gen filtreras plankton, kr\u00e4ftdjur och sm\u00e5fisk bort och sm\u00e4lts sedan av valhajen. En valhaj kan filtrera \u00f6ver 600 000 liter vatten per timme! Detta \u00e4r i princip samma teknik som barder <a href=\"https:\/\/www.123fakta.com\/se\/fakta-om-valar\/\">valar<\/a> (t.ex. bl\u00e5valar) anv\u00e4nder<\/li>\n<li><strong>Mun:<\/strong>\u00a0Den vuxna valhajens mun \u00e4r ca 1,5 meter bred och inneh\u00e5ller 300 - 350 rader med t\u00e4nder. Totalt har den omkring 3 000 t\u00e4nder, men de \u00e4r inte lika skr\u00e4ckinjagande som p\u00e5 m\u00e5nga andra hajar; de ser mer ut som sm\u00e5 spikar. Den har ocks\u00e5 10 filterplattor i munnen, som anv\u00e4nds f\u00f6r att filtrera f\u00f6da fr\u00e5n vattnet<\/li>\n<li><strong>Hud:<\/strong>\u00a0Valhajens hud kan bli upp till 10 cm tjock, vilket skyddar den mot bett fr\u00e5n andra djur<\/li>\n<li><strong>Livsl\u00e4ngd:<\/strong>\u00a0En valhaj blir normalt omkring 70 \u00e5r gammal, men man tror att de kan bli upp till 150 \u00e5r gamla<\/li>\n<li><strong>Reproduktion:<\/strong>\u00a0Valhajar b\u00f6rjar inte para sig f\u00f6rr\u00e4n de \u00e4r \u00f6ver 30 \u00e5r gamla (de \u00e4r inte k\u00f6nsmogna f\u00f6rr\u00e4n dess). Honorna f\u00f6der levande ungar och har vanligtvis hundratals valhajsembryon inuti sig. De f\u00f6der dock inte alla p\u00e5 en g\u00e5ng, utan \u00f6ver tid. Den minsta valhaj som n\u00e5gonsin hittats var bara 38 cm l\u00e5ng (7 mars 2009 i Filippinerna)<\/li>\n<li><strong>Broskfisk:<\/strong>\u00a0Liksom andra <a href=\"https:\/\/www.123fakta.com\/se\/fakta-om-hajar\/\">Hajar<\/a>, valhajar \u00e4r broskfiskar, vilket inneb\u00e4r att deras skelett \u00e4r uppbyggt av brosk ist\u00e4llet f\u00f6r ben<\/li>\n<li><strong>F\u00e4rger:<\/strong>\u00a0Valhajens rygg \u00e4r bl\u00e5gr\u00e5 till brun med vita eller gr\u00e4ddf\u00e4rgade fl\u00e4ckar. P\u00e5 buken \u00e4r de vita. Deras f\u00e4rger anv\u00e4nds som kamouflage. Deras fl\u00e4ckm\u00f6nster \u00e4r unika f\u00f6r varje individ - precis som m\u00e4nskliga fingeravtryck<\/li>\n<li><strong>Livsmilj\u00f6:<\/strong>\u00a0Valhajen lever b\u00e5de i \u00f6ppna havet och i kustvatten och finns i tropiska och varma tempererade hav. Valhajar finns i vatten i mer \u00e4n 100 l\u00e4nder<\/li>\n<\/ol>\n<h2>Mer fakta om hajar<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"318\" class=\"size-full wp-image-3422 aligncenter\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/hvalhajers-udbredelse.jpg\" alt=\"Hvalhajer lever i de tropiske og varme verdenshave\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/hvalhajers-udbredelse.jpg 620w, https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/hvalhajers-udbredelse-300x154.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/hvalhajers-udbredelse-18x9.jpg 18w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/p>\n<p style=\"text-align: center;\"><em><strong>Fakta: Valhajen lever i de tropiska och varma v\u00e4rldshaven. I bilden markerar de bl\u00e5 omr\u00e5dena utbredningen av valhajar<\/strong><\/em><\/p>\n<ul>\n<li><strong>Bevarande<\/strong>: Valhajar \u00e4r fridlysta i m\u00e5nga l\u00e4nder eftersom deras population st\u00e4ndigt minskar. Valhajar k\u00e4nnetecknas av\u00a0<a href=\"http:\/\/www.iucnredlist.org\/details\/19488\/0\" rel=\"noopener noreferrer\">\"s\u00e5rbar f\u00f6r utrotning\" av IUCN<\/a><\/li>\n<li><strong>V\u00e4nliga hajar<\/strong>: Valhajar \u00e4r k\u00e4nda f\u00f6r att vara v\u00e4nliga och fredliga och skadar eller st\u00f6r inte andra djur i sin omgivning<\/li>\n<li><strong>Hot<\/strong>: De enda hoten mot valhajen \u00e4r sp\u00e4ckhuggare, vithaj och m\u00e4nniskor. P\u00e5 m\u00e5nga platser jagar m\u00e4nniskor valhajar, fr\u00e4mst p\u00e5 grund av anv\u00e4ndningen av valhajsfenor i traditionell kinesisk medicin, men \u00e4ven andra anv\u00e4ndningsomr\u00e5den i sydostasiatiska l\u00e4nder. Valhajar \u00e4r l\u00e4tta att f\u00e5nga p\u00e5 grund av sin storlek, men ocks\u00e5 f\u00f6r att de simmar l\u00e5ngsamt och n\u00e4ra vattenytan. I Indien d\u00f6dades \u00f6ver 1 000 hajar mellan 1999 och 2000.<\/li>\n<li><strong>Turism med valhajar<\/strong>P\u00e5 senare \u00e5r har det blivit popul\u00e4rt att dyka med valhajar, vilket har gett upphov till en liten resebransch som kallas \"valhajsturism\". Australien, Mexiko, Honduras och Filippinerna \u00e4r n\u00e5gra av de l\u00e4nder d\u00e4r man kan dyka med valhajar<\/li>\n<li><strong>Migration<\/strong>: Valhajar migrerar och g\u00f6r flera l\u00e5nga resor varje \u00e5r. Forskarna har fortfarande d\u00e5lig kunskap om valhajarnas vandringsm\u00f6nster, men en g\u00e5ng sp\u00e5rades en valhaj som simmade 13 000 km fr\u00e5n Kalifornien i USA till Tonga (\u00f6ster om Australien) - s\u00e5 man vet med s\u00e4kerhet att de f\u00e4rdas l\u00e5nga str\u00e4ckor. \u00c5r 2009 observerades en flock p\u00e5 400 valhajar utanf\u00f6r Yucat\u00e1nhalv\u00f6n i Mexiko, vilket tyder p\u00e5 att valhajar ocks\u00e5 migrerar i flockar<\/li>\n<\/ul>\n<h2>Video om valhajar<\/h2>\n<p>Nedan kan du se en video om valhajar.<\/p>\n<div class=\"videoWrapper\"><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/uQrBwN39LJI\" width=\"640\" height=\"480\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/div>","protected":false},"excerpt":{"rendered":"<p>Namnet p\u00e5 hajen: Valhajens namn kommer fr\u00e5n dess enorma storlek (en haj i storlek med en val = valhaj). Dess latinska namn \u00e4r Rhincodon typus V\u00e4rldens st\u00f6rsta fisk: Valhajen \u00e4r den st\u00f6rsta fisken i v\u00e4rlden. Den st\u00f6rsta registrerade valhajen var 12,65 meter l\u00e5ng och v\u00e4gde 21,5 ton (Karachi, Pakistan 1947). ... <a title=\"Fakta om valhajar\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/se\/facts-about-whale-sharks\" aria-label=\"L\u00e4s mer om Fakta om valhajar\">L\u00e4s mer<\/a><\/p>","protected":false},"author":1,"featured_media":6337,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[67,74],"tags":[120],"class_list":["post-3421","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-animals","category-aquatic-animals","tag-adsense"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Whale sharks - Facts about their size, food, behavior, etc.<\/title>\n<meta name=\"description\" content=\"Fact: Whale sharks are the largest fish in the world. 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De har \u00f6ver 3 000 t\u00e4nder och kan filtrera mer \u00e4n 600 000 liter vatten per timme.","breadcrumb":{"@id":"https:\/\/www.123fakta.com\/facts-about-whale-sharks#breadcrumb"},"inLanguage":"sv-SE","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.123fakta.com\/facts-about-whale-sharks"]}]},{"@type":"ImageObject","inLanguage":"sv-SE","@id":"https:\/\/www.123fakta.com\/facts-about-whale-sharks#primaryimage","url":"https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/Whale_shark-min.jpg","contentUrl":"https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/Whale_shark-min.jpg","width":1000,"height":461,"caption":"Fact: Whale sharks are the largest fish in the world. 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