Home / Science / Massive Ray Gathering Linked to Tuna Ranch Off Malta
Massive Ray Gathering Linked to Tuna Ranch Off Malta
8 Sep
Summary
- Over 100 eagle rays recorded at Malta tuna farm.
- Aggregation driven by available food fish scraps.
- Vulnerable species' behavior impacted by aquaculture.
An unprecedented aggregation of over 100 common eagle rays was documented near a tuna ranch off Malta in October 2024. This event, captured by a remotely operated vehicle during routine monitoring, is the largest recorded gathering of this species.
Researchers observed that the rays were concentrated beneath tuna cages where leftover food fish had accumulated on the seabed. This readily available food source is believed to be the primary driver for the aggregation, as isolated rays were seen where no food was present.
The study, published in 'Marine Biodiversity,' notes the common eagle ray is vulnerable in the Mediterranean. This sighting raises important questions about how tuna farming influences the behavior and conservation of these marine animals.
Experts suggest that fishing restrictions around tuna ranches could help protect these congregations. Further monitoring will determine if this gathering is an isolated incident, seasonal, or a pattern linked to tuna farm feeding activities.
