The flathead grey mullet is a global traveler with a redundant scientific name.

Nature · Published 3 October 2026 Swipe more like this →

In short: Found in coastal waters from the Atlantic to the Pacific, the flathead grey mullet is a master of adaptation. Known by many names, this fish thrives in fresh, brackish, and marine environments. Its scientific name, Mugil cephalus, is a literal translation of mullet-mullet, highlighting its status as the quintessential representative of its family.

The flathead grey mullet, or Mugil cephalus, is a cosmopolitan species inhabiting temperate, subtropical, and tropical zones worldwide. These fish are euryhaline, meaning they can acclimate to varying salinity levels, allowing them to traverse marine, estuarine, and freshwater habitats. They typically school over sand or mud bottoms, feeding on detritus, microalgae, and zooplankton. While they often occupy depths up to 120 metres, they must return to the sea to spawn.

Physically, the species is defined by its olive-green back, silvery sides, and occasional lateral stripes. While a common length is 50 cm, they can reach up to 100 cm and weigh 8 kg. Their distribution is vast, spanning from the Bay of Biscay to the Colorado River. However, human infrastructure, such as dams, has restricted their historical range in the American West, leading to population declines where river flows no longer reach the sea.

Beyond its ecological role, the mullet is a significant global food source. Its roe is a prized delicacy, processed into various regional specialties like Italian bottarga, Japanese karasumi, and Greek avgotaraho. In Egypt, the fish is pickled to create fesikh, while in the American South, it is a staple of local seafood culture. Recent scientific interest has focused on the species' ontogeny, with 2021 research into its osteological development providing critical insights for aquaculture and phylogenetic studies.

The species is both fished and farmed, with worldwide production reaching approximately 125,000 tonnes in 2024. Despite its popularity, the fish's taste can vary based on its environment; for instance, in Florida, the white mullet is sometimes preferred over the flathead grey mullet due to a perceived cleaner flavor profile. This adaptability and widespread consumption underscore the mullet's enduring importance in global food systems.

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