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Post-hatching larval stage occurring in many fish species whereby the yolk sac remains attached to the ventral surface for a period. The larva does not feed normally until the yolk is fully-absorbed.

","definitionText","Post-hatching larval stage occurring in many fish species whereby the yolk sac remains attached to the ventral surface for a period. The larva does not feed normally until the yolk is fully-absorbed.","isScientific",false,"isCrossReference","isArchived","crossReferenceTo","illustrations",[],"related",[32,33,34,35,36],"species",[],"speciesCount",0,"speciesPagination",{"_11":51,"_9":51,"_39":52,"_20":19,"_18":19,"_29":30},{"_11":48,"_9":48,"_39":49,"_20":19,"_18":19,"_29":50},{"_11":45,"_9":45,"_39":46,"_20":19,"_18":19,"_29":47},{"_11":42,"_9":42,"_39":43,"_20":19,"_18":19,"_29":44},{"_11":37,"_9":38,"_39":40,"_20":19,"_18":19,"_29":41},"yolk-sac","yolk sac","definition","A membranous sac containing yolk attached to the ventral surface of embryos and early larvae in some fishes. Retained for a period post-hatching in those species which form yolk sac larvae.",225,"yolk","Substance in an animal egg consisting of protein and fat that nourishes the developing embryo.",114,"ventral","Of, on, or relating to the underside of an animal or plant; abdominal.",232,"larval","Of, relating to, or being a larva.",47,"larva","Immature free-living juvenile form of an organism that undergoes metamorphosis before assuming the adult form.","requestId","e95ef85c-ae12-4a5f-8f04-03ce348e5481","nonce","9wD/OOWgTUh4zoOdUbbzuw==","analyticsToken","d6ab6d3180364bdf8f98e5d5fa0b1eb7","siteUrl","https://www.seriouslyfish.com","indexable",true,"adPlaceholders",{"_67":68,"_69":70,"_71":72,"_73":74,"_75":76,"_77":78,"_79":80,"_81":82,"_83":84,"_85":86},"adSlotPreview","ezoicEnabled","top_of_page","126","sidebar","127","sheet_foot","128","in_content_1","129","in_content_2","130","in_content_3","131","in_content_4","132","in_content_5","133","in_content_6","134","bottom_of_page","135"]