A fish belonging to the herring family (Clupeidae), including herrings, sardines, anchovies, and pilchards.
From Latin 'clupea' (herring) + Greek '-oid' (form, kind). The term became standardized in ichthyology during the 18th-19th centuries as scientists classified fish species.
Clupeoid fish are so abundant that they make up about 20% of all fish caught by humans globally. A single school of herrings can contain billions of individuals, making them nature's ultimate social network—moving as one giant organism.
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