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Invasive algae detected on Barcelona coast

During the summer of 2023. a new invasive alga was detected for the first time on the coast of Barcelona and, due to its rapid growth and absence of predators, it poses a substantial threat to local marine ecosystems.

Red alga Asparagopsis taxiformis poses threat to marine ecosystems

The red alga, Asparagopsis taxiformis, is common in warm areas of the Indo-Pacific and Atlantic oceans and has previously been detected, and its invasive nature noted, in other areas of the Spanish coastline as early as 2017.

Experts call for help in monitoring exotic algae

Exotic algae in the area are being identified and studied to see how the local biodiversity and ecosystems are being affected with the goal of management strategies being put into place. In order for enough data to be collected, the initiative CSIC Observadores del Mar are calling on divers and snorkellers in the area to help.

A Seahorse Swimming In The Waters Of Cala Joncols, Spain.

How to get involved

When you see a target species or one you have never seen before, take a photo to help identify it and send details about its environment. If you visit the same area, you will contribute to assessing the expansion of identified species.

By getting involved in citizen science initiatives such as this, you will be directly contributing to the health of our seas and helping to preserve the wonderful marine diversity we all love to observe during our underwater adventures. Euro-Divers Spain is supporting the algae monitoring project and other projects in the area including data collection on seahorses, pipe fish and rays so, if you are in the area, please do pop in and talk about your observations.

Find out more at Observadores del Mar