Golden grey mullet

The golden grey mullet, taxonomically identified as Mugil auratus, belongs to the Mugilidae family and the Mugiliformes order. While naturally occurring in marine and brackish environments, it often impacts commercial aquaculture by invading artificial ponds and enclosed aquatic systems used for farming other fish species.

In an agricultural context, Mugil auratus is considered a pest due to its high competitive pressure on cultivated species. It exploits the same food niche as common carp or other freshwater fishes, consuming both natural pond nutrients and formulated feeds, which significantly decreases the overall profitability of the aquaculture operation.

The biology of this species is characterized by remarkable adaptability to fluctuating salinity levels. The life cycle involves spawning in the open sea, after which the juveniles migrate into coastal lagoons and inland waterways. This migration behavior allows them to penetrate irrigation systems and water supply channels of fish farms, establishing stable populations.

The economic damage caused by this mullet is substantial. Beyond direct competition for food, it disrupts the pond ecosystem, leading to poor growth performance of the target harvest. Furthermore, the presence of wild Mugil auratus increases the risk of parasitic outbreaks and bacterial infections that can spread rapidly among high-density stocks in a confined environment.

Effective protection measures focus on exclusion and pond management. Operators should prioritize the installation of fine-mesh filtration screens at all inlet points to prevent the entry of larvae. Additionally, implementing rigorous pond rotation, seasonal drying, and complete desilting helps eliminate existing populations and maintain optimal production standards.