Status of Marine Alien Species Along the Libyan Coast

The number of marine alien species in Libyan waters has increased from 63 (2013) to 73 (2019). This study provides a comprehensive status update, distribution analysis, and impact assessment of these species along Libya’s 2,000 km coastline.

Key findings include:

• Fishes (32.88%) are the most dominant alien species, followed by macrophytes (21.92%), mollusks (16.44%), crustaceans (13.70%), and parasites (9.59%).
• Seven alien parasite species were found in three Lessepsian fish species.
• The highly toxic Lagocephalus sceleratus (Silverstripe Blaasop) population has increased dramatically, posing serious health risks to local fishers.
• Some alien species, such as Siganus spp. (rabbitfish), are competing with native species like Sarpa salpa (salema fish), altering local biodiversity.
• A few alien species have gained commercial value in Libya, becoming part of the local fishery market.

Key Findings :

• Rising Invasion Rate: Libya’s waters are experiencing a steady increase in non-native species.
• Ecosystem Disruptions: Competition for food and habitat is impacting native species populations.
• Human Health Risks: Toxic alien species like Lagocephalus sceleratus pose serious dangers.
• Adaptation & Expansion: Some alien species are well-adapted and are now economically valuable.

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