Tunas and other ocean predators may have evolved more slowly than previous research predicted

Today, oceans host a large variety of fast, resilient marine predators, including tunas, mackerels and various other fish ...
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Systematics of the tunas and mackerels (Scombridae)

Collette, Bruce B., Reeb, C., and Block, B. A. 2001. "Systematics of the tunas and mackerels (Scombridae)." In Tuna: physiology, ecology, and evolution. Block, B. A ...