Sardine, Fish Species Guide

Small to medium-sized fish that somewhat looks like herring. It is silver in colour with a darker, green or olive-coloured back, small pectoral and anal fins, a triangular dorsal fin and a deeply forked tail.

TIL Sardines aren't a specific fish. The word is used for multiple species of small, oily fish. The definition for what constitutes a sardine varies by government and region with the UN

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Sardines: Important Facts, Health Benefits, and Recipes - Relish

Pacific Sardine California Sea Grant

When will sardines return? Not any time soon say scientists – Monterey Herald

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