{"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\/da\/facts-about-fish","title":{"rendered":"Fakta om fisk"},"content":{"rendered":"<ol>\n<li><strong>Sjovt navn:<\/strong>\u00a0Der findes en fiskeart, der hedder 'slippery dick' (Halichoeres bivittatus).<\/li>\n<li><strong>Sharks:<\/strong>\u00a0<a href=\"https:\/\/www.123fakta.com\/da\/fakta-om-hajer\/\">Hajer<\/a> dr\u00e6ber 12 mennesker om \u00e5ret. Mennesker dr\u00e6ber 11.417 hajer i timen.<\/li>\n<li><strong>K\u00f8n:<\/strong>\u00a0Mange fiskearter skifter k\u00f8n i l\u00f8bet af deres liv<\/li>\n<li><strong>Jeg tager ud at sv\u00f8mme:<\/strong>\u00a0Nogle fisk - som hajer - har ingen luftbl\u00e6re og er derfor n\u00f8dt til at sv\u00f8mme for at undg\u00e5 at synke til bunds.<\/li>\n<li><strong>Ingen urin:<\/strong>\u00a0Fisk tisser ikke, som pattedyr g\u00f8r; i stedet udskiller de ammoniak i vandet via deres g\u00e6ller.<\/li>\n<li><strong>Smagssans:<\/strong>\u00a0De fleste fisk kan smage uden at \u00e5bne munden<\/li>\n<li><strong>Giftig pindsvinefisk:<\/strong>\u00a0En pindsvinefisk indeholder nok gift til at dr\u00e6be 30 mennesker<\/li>\n<li><strong>L\u00e6bestift:<\/strong>\u00a0Nogle typer l\u00e6bestift indeholder fiskesk\u00e6l (is\u00e6r dem, der g\u00f8r l\u00e6berne skinnende eller glitrende).<\/li>\n<li><strong>Sidelinjeorganet:<\/strong>\u00a0Fisk har et specielt organ kaldet \u2019sidelinjeorganet\u2019 (eller den \u2019laterale linje\u2019), der fungerer p\u00e5 samme m\u00e5de som en radar og hj\u00e6lper dem til at finde rundt i m\u00f8rkt eller mudret vand. Det er ogs\u00e5 sidelinjeorganet, der sikrer, at fiskene ikke st\u00f8der sammen, n\u00e5r de f.eks. sv\u00f8mmer i stimer<\/li>\n<li><strong>Eksistens:<\/strong>\u00a0Fisk har eksisteret p\u00e5 Jorden i mere end 450 millioner \u00e5r og var der l\u00e6nge f\u00f8r <a href=\"https:\/\/www.123fakta.com\/da\/fakta-om-dinosaurer\/\">Dinosaurer<\/a> ankommet. Pattedyr har kun v\u00e6ret p\u00e5 jorden i omkring 200 millioner \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: Afrikanske lungefisk kan leve op til 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\">Tilskrivning: Mathae - Wikipedia.org<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Afrikanske lungefisk kan overleve p\u00e5 land i op til 2 \u00e5r, hvor de g\u00e5r i dvale under jorden og venter p\u00e5, at vandstanden stiger.<\/strong><\/em><\/p>\n<h2>Rekorder i fiskenes verden<\/h2>\n<ul>\n<li><strong>Hurtigste fisk:<\/strong>\u00a0Sejlfisk kan sv\u00f8mme med hastigheder p\u00e5 op til 110 km\/t.<\/li>\n<li><strong>Arter:<\/strong>\u00a0Der findes mere end 32.000 fiskearter, hvilket g\u00f8r fisk til den mest forskelligartede gruppe af alle hvirveldyr. Der er flere fiskearter end padder, krybdyr, fugle og pattedyr tilsammen.<\/li>\n<li><strong>St\u00f8rste fisk:<\/strong>\u00a0Verdens st\u00f8rste fisk er\u00a0<a title=\"Fakta om hvalhajer\" href=\"https:\/\/www.123fakta.com\/da\/fakta-om-hvalhajer\">Hvalhaj<\/a>\u00a0(Rhincodon typus) . Den st\u00f8rste registrerede hvalhaj var 12,65 meter lang og vejede 21,5 tons.<\/li>\n<li><strong>St\u00f8rste fiske\u00e6g:<\/strong>\u00a0Verdens st\u00f8rste fiske\u00e6g var et hvalhaj\u00e6g, der blev fundet i Den Mexicanske Golf i 1950'erne, og som m\u00e5lte 35,6 cm.<\/li>\n<li><strong>Mindste fisk:<\/strong>\u00a0Verdens mindste fisk er Paedocypris progenetica, hvor det mindste registrerede eksemplar var 7,9 mm langt. Hannerne n\u00e5r en maksimal l\u00e6ngde p\u00e5 9,8 mm og hunnerne 10,3 mm.<\/li>\n<li><strong>\u00c6ldste fisk:<\/strong>\u00a0Nogle af de \u00e6ldste fisk omfatter underarten Koi (Cyprinus carpio haematopterus) og sl\u00e6gten Kingfish (Sebastes spp.), som begge kan blive over 200 \u00e5r gamle.<\/li>\n<li><strong>De fleste \u00e6g:<\/strong>\u00a0En solfiskehun kan gyde op til 300 millioner \u00e6g p\u00e5 en enkelt gydes\u00e6son.<\/li>\n<li><strong>Det f\u00f8rste akvarium:<\/strong>\u00a0I 1853 \u00e5bnede verdens f\u00f8rste offentligt tilg\u00e6ngelige akvarium i London, Storbritannien. Allerede i 1856 blev det andet akvarium \u00e5bnet i New York, USA.<\/li>\n<li><strong>St\u00f8rste fiskefossil:<\/strong>\u00a0Verdens st\u00f8rste fiskefossil blev fundet i England i 2003 og m\u00e5lte hele 22 meter! Fossilet var af arten Leedsichthys problematicus, som levede for 150 millioner \u00e5r siden.<\/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: Solfisk kan gyde op til 300.000.000 \u00e6g p\u00e5 en s\u00e6son.\" 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\">Tilskrivning: Per-Ola Norman - Wikipedia.org<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Solfisk kan gyde flest \u00e6g af alle fisk; op til 300 millioner p\u00e5 en gydes\u00e6son.<\/strong><\/em><\/p>\n<h2>Flere fakta om fisk<\/h2>\n<ul>\n<li><strong>Sv\u00f8m bagl\u00e6ns:<\/strong>\u00a0Nogle fisk kan sv\u00f8mme bagl\u00e6ns, f.eks. aftr\u00e6kkerfisk (balistidae).<\/li>\n<li><strong>Land og luft:<\/strong>\u00a0Alle fisk sv\u00f8mmer, men nogle kan ogs\u00e5 hoppe p\u00e5 vandet, flyve og endda g\u00e5 p\u00e5 land.<\/li>\n<li><strong>Lungefisk:<\/strong>\u00a0Den afrikanske lungefisk (Protopterus) kan leve p\u00e5 land i op til 2 \u00e5r. De g\u00e5r i dvale under jorden og venter p\u00e5, at vandstanden stiger.<\/li>\n<li><strong>Ferskvandsarter:<\/strong>\u00a040% af alle fiskearter lever i ferskvand, selvom mindre end 0,1% af jordens vand er ferskvand.<\/li>\n<li><strong>Gydning med munden:<\/strong>\u00a0Banggai-kardinalen (Pterapogon kauderni) holder b\u00e5de \u00e6g og yngel i munden, indtil ynglen er i stand til at sv\u00f8mme selv. Da denne proces varer flere uger, spiser banggai-kardinalen ikke noget, f\u00f8r ynglen kl\u00e6kkes.<\/li>\n<li><strong>Bruskskeletter:<\/strong>\u00a0Nogle fisk har et skelet, der udelukkende best\u00e5r af brusk (f.eks. hajer).<\/li>\n<li><strong>Sanser:<\/strong>\u00a0Fisk kan f\u00f8le smerte og stress ligesom fugle, pattedyr osv.<\/li>\n<li><strong>Truede fisk:<\/strong>\u00a0Der er mere end 1.000 truede fiskearter.<\/li>\n<li><strong>Akvarievand:<\/strong>\u00a0Det var f\u00f8rst i 1853 (i London), at man inds\u00e5, at filtrering og iltning af akvarievand var n\u00f8dvendigt, for at fiskene kunne overleve i det. F\u00f8r da blev alle fisk holdt udend\u00f8rs<\/li>\n<li><strong>Iktyologi:<\/strong>\u00a0Studiet af fisk kaldes \"iktyologi\", og en person, der studerer fisk, kaldes en \"iktyolog\".<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Sjovt navn: Der findes en fiskeart, der hedder 'slippery dick' (Halichoeres bivittatus) Hajer: Hajer dr\u00e6ber 12 mennesker om \u00e5ret. Mennesker dr\u00e6ber 11.417 hajer i timen K\u00f8n: Mange fiskearter skifter k\u00f8n i l\u00f8bet af deres liv, mens de sv\u00f8mmer: Nogle fisk - som hajer - har ingen luftbl\u00e6re og er derfor n\u00f8dt til at sv\u00f8mme for at undg\u00e5 at synke til bunds ... <a title=\"Fakta om fisk\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/da\/facts-about-fish\" aria-label=\"L\u00e6s mere om fakta om fisk\">L\u00e6s Mere<\/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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