{"id":1642,"date":"2014-05-18T10:59:53","date_gmt":"2014-05-18T10:59:53","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=1642"},"modified":"2026-03-24T16:26:11","modified_gmt":"2026-03-24T16:26:11","slug":"fakta-om-fisk","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/se\/facts-about-fish","title":{"rendered":"Fakta om fiskar"},"content":{"rendered":"<ol>\n<li><strong>Roligt namn:<\/strong>\u00a0Det finns en fiskart som kallas \"slippery dick\" (Halichoeres bivittatus)<\/li>\n<li><strong>Sharks:<\/strong>\u00a0<a href=\"https:\/\/www.123fakta.com\/se\/fakta-om-hajar\/\">Hajar<\/a> d\u00f6dar 12 m\u00e4nniskor per \u00e5r. M\u00e4nniskor d\u00f6dar 11 417 hajar per timme<\/li>\n<li><strong>K\u00f6n:<\/strong>\u00a0M\u00e5nga fiskarter byter k\u00f6n under sin livstid<\/li>\n<li><strong>G\u00e5 och simma:<\/strong>\u00a0Vissa fiskar - som hajar - har ingen luftbl\u00e5sa och m\u00e5ste d\u00e4rf\u00f6r simma f\u00f6r att inte sjunka till botten<\/li>\n<li><strong>Ingen urin:<\/strong>\u00a0Fiskar kissar inte som d\u00e4ggdjur, utan uts\u00f6ndrar ammoniak i vattnet via sina g\u00e4lar<\/li>\n<li><strong>Smaksinne:<\/strong>\u00a0De flesta fiskar kan smaka utan att \u00f6ppna munnen<\/li>\n<li><strong>Giftig igelkottsfisk:<\/strong>\u00a0En igelkottsfisk inneh\u00e5ller tillr\u00e4ckligt med gift f\u00f6r att d\u00f6da 30 personer<\/li>\n<li><strong>L\u00e4ppstift:<\/strong>\u00a0Vissa typer av l\u00e4ppstift inneh\u00e5ller fiskfj\u00e4ll (s\u00e4rskilt de som g\u00f6r l\u00e4pparna blanka eller glittriga)<\/li>\n<li><strong>Sidolinjeorgan:<\/strong>\u00a0Fiskar har ett speciellt organ som kallas \"sidolinjeorgan\" (eller \"sidolinje\"), som fungerar p\u00e5 samma s\u00e4tt som en radar och hj\u00e4lper dem att navigera i m\u00f6rker eller i grumligt vatten. Det \u00e4r ocks\u00e5 sidolinje organet som ser till att fisken inte simmar in i n\u00e5gonting n\u00e4r de till exempel simmar i stim<\/li>\n<li><strong>Existens:<\/strong>\u00a0Fiskar har funnits p\u00e5 jorden i mer \u00e4n 450 miljoner \u00e5r och fanns d\u00e4r l\u00e5ngt innan <a href=\"https:\/\/www.123fakta.com\/se\/fakta-om-dinosaurier\/\">dinosaurier<\/a> anl\u00e4nde. D\u00e4ggdjur har bara funnits p\u00e5 jorden i cirka 200 miljoner \u00e5r<\/li>\n<\/ol>\n<figure id=\"attachment_7524\" aria-describedby=\"caption-attachment-7524\" style=\"width: 990px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7524\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/lungefisk-fakta-2.jpg\" alt=\"Fakta: Afrikansk lungfisk kan leva upp till 2 \u00e5r p\u00e5 land\" width=\"1000\" height=\"750\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/lungefisk-fakta-2.jpg 1000w, https:\/\/www.123fakta.com\/wp-content\/uploads\/lungefisk-fakta-2-300x225.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/lungefisk-fakta-2-768x576.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/lungefisk-fakta-2-16x12.jpg 16w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-7524\" class=\"wp-caption-text\">Tillskrivning: Mathae - Wikipedia.org<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Afrikanska lungfiskar kan \u00f6verleva p\u00e5 land i upp till 2 \u00e5r, d\u00e4r de \u00f6vervintrar under jorden och v\u00e4ntar p\u00e5 att vattenniv\u00e5n ska stiga<\/strong><\/em><\/p>\n<h2>Rekord i fiskens v\u00e4rld<\/h2>\n<ul>\n<li><strong>Snabbaste fisk:<\/strong>\u00a0Segelfiskar kan simma i hastigheter p\u00e5 upp till 110 km\/h<\/li>\n<li><strong>Arter:<\/strong>\u00a0Det finns mer \u00e4n 32 000 fiskarter, vilket g\u00f6r fiskar till den mest m\u00e5ngskiftande gruppen av alla ryggradsdjur. Det finns fler fiskarter \u00e4n amfibier, reptiler, f\u00e5glar och d\u00e4ggdjur tillsammans<\/li>\n<li><strong>St\u00f6rsta fisken:<\/strong>\u00a0V\u00e4rldens st\u00f6rsta fisk \u00e4r\u00a0<a title=\"Fakta om valhajar\" href=\"https:\/\/www.123fakta.com\/da\/fakta-om-hvalhajer\">valhaj<\/a>\u00a0(Rhincodon typus) . Den st\u00f6rsta valhaj som registrerats var 12,65 meter l\u00e5ng och v\u00e4gde 21,5 ton<\/li>\n<li><strong>St\u00f6rsta fisk\u00e4gg:<\/strong>\u00a0V\u00e4rldens st\u00f6rsta fisk\u00e4gg var ett valhajs\u00e4gg som hittades i Mexikanska golfen p\u00e5 1950-talet och m\u00e4tte 35,6 cm<\/li>\n<li><strong>Minsta fisk:<\/strong>\u00a0V\u00e4rldens minsta fisk \u00e4r Paedocypris progenetica, d\u00e4r det minsta registrerade exemplaret var 7,9 mm l\u00e5ngt. Hanar n\u00e5r en maximal l\u00e4ngd p\u00e5 9,8 mm och honor 10,3 mm.<\/li>\n<li><strong>\u00c4ldsta fisken:<\/strong>\u00a0N\u00e5gra av de \u00e4ldsta fiskarna \u00e4r underarten Koi (Cyprinus carpio haematopterus) och sl\u00e4ktet Kingfish (Sebastes spp.), som b\u00e5da kan bli \u00f6ver 200 \u00e5r gamla.<\/li>\n<li><strong>Mest \u00e4gg:<\/strong>\u00a0En solabborrehona kan l\u00e4gga upp till 300 miljoner \u00e4gg under en enda lekperiod<\/li>\n<li><strong>F\u00f6rsta akvariet:<\/strong>\u00a0\u00c5r 1853 \u00f6ppnade v\u00e4rldens f\u00f6rsta offentligt tillg\u00e4ngliga akvarium i London, Storbritannien. Redan 1856 \u00f6ppnades det andra akvariet i New York, USA<\/li>\n<li><strong>St\u00f6rsta fiskfossil:<\/strong>\u00a0V\u00e4rldens st\u00f6rsta fiskfossil hittades i England 2003 och m\u00e4tte hela 22 meter! Fossilet var av arten Leedsichthys problematicus, som levde f\u00f6r 150 miljoner \u00e5r sedan<\/li>\n<\/ul>\n<figure id=\"attachment_7526\" aria-describedby=\"caption-attachment-7526\" style=\"width: 990px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7526\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/klumpfisk-fakta-2.jpg\" alt=\"Fakta: Solabborre kan l\u00e4gga upp till 300 000 000 \u00e4gg under en s\u00e4song\" width=\"1000\" height=\"815\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/klumpfisk-fakta-2.jpg 1000w, https:\/\/www.123fakta.com\/wp-content\/uploads\/klumpfisk-fakta-2-300x245.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/klumpfisk-fakta-2-768x626.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/klumpfisk-fakta-2-15x12.jpg 15w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-7526\" class=\"wp-caption-text\">Tillskrivning: Per-Ola Norman - Wikipedia.org<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Solabborre kan l\u00e4gga flest \u00e4gg av alla fiskar, upp till 300 miljoner under en lekperiod<\/strong><\/em><\/p>\n<h2>Mer fakta om fiskar<\/h2>\n<ul>\n<li><strong>Simma bakl\u00e4nges:<\/strong>\u00a0Vissa fiskar kan simma bakl\u00e4nges, t.ex. triggerfiskar (balistidae)<\/li>\n<li><strong>Land och luft:<\/strong>\u00a0Alla fiskar simmar, men vissa kan ocks\u00e5 hoppa p\u00e5 vatten, flyga och till och med g\u00e5 p\u00e5 land<\/li>\n<li><strong>Lungfisk:<\/strong>\u00a0Den afrikanska lungfisken (Protopterus) kan leva p\u00e5 land i upp till 2 \u00e5r. De \u00f6vervintrar under jorden och v\u00e4ntar p\u00e5 att vattenniv\u00e5n ska stiga<\/li>\n<li><strong>S\u00f6tvattensarter:<\/strong>\u00a040% av alla fiskarter lever i s\u00f6tvatten, trots att mindre \u00e4n 0,1% av jordens vatten \u00e4r s\u00f6tvatten<\/li>\n<li><strong>Spottning i munnen:<\/strong>\u00a0Banggaikardinalen (Pterapogon kauderni) h\u00e5ller b\u00e5de \u00e4gg och yngel i munnen tills ynglen kan simma p\u00e5 egen hand. Eftersom denna process tar flera veckor \u00e4ter Banggai-kardinalen ingenting f\u00f6rr\u00e4n ynglen har kl\u00e4ckts<\/li>\n<li><strong>Broskskelett:<\/strong>\u00a0Vissa fiskar har skelett som helt best\u00e5r av brosk (t.ex. hajar)<\/li>\n<li><strong>Sinnen:<\/strong>\u00a0Fiskar kan k\u00e4nna sm\u00e4rta och stress precis som f\u00e5glar, d\u00e4ggdjur osv.<\/li>\n<li><strong>Utrotningshotad fisk:<\/strong>\u00a0Det finns mer \u00e4n 1 000 utrotningshotade fiskarter<\/li>\n<li><strong>Vatten f\u00f6r akvarium:<\/strong>\u00a0Det var inte f\u00f6rr\u00e4n 1853 (i London) som man ins\u00e5g att filtrering och syres\u00e4ttning av akvarievatten var n\u00f6dv\u00e4ndigt f\u00f6r att fiskar skulle kunna \u00f6verleva i det. Innan dess h\u00f6lls alla fiskar utomhus<\/li>\n<li><strong>Iktyologi:<\/strong>\u00a0Studiet av fiskar kallas \"ichtyologi\" och en person som studerar fiskar kallas \"ichtyolog\".<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Roligt namn: Det finns en fiskart som heter \"slippery dick\" (Halichoeres bivittatus) Hajar: Hajar d\u00f6dar 12 personer per \u00e5r. M\u00e4nniskor d\u00f6dar 11 417 hajar per timme K\u00f6n: M\u00e5nga fiskarter byter k\u00f6n under sin livstid Simning: Vissa fiskar - till exempel hajar - har ingen luftbl\u00e5sa och m\u00e5ste d\u00e4rf\u00f6r simma f\u00f6r att inte sjunka till botten... <a title=\"Fakta om fiskar\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/se\/facts-about-fish\" aria-label=\"L\u00e4s mer om Fakta om fisk\">L\u00e4s mer<\/a><\/p>","protected":false},"author":1,"featured_media":7527,"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-1642","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 v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fish facts - 29 fun and interesting facts about fish<\/title>\n<meta name=\"description\" content=\"Fact: Fish do not pee. 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