Yesterday a blue shark (Prionace glauca) was seen in the harbour of Veli Lošinj. We would like to take this opportunity to share some facts about this fascinating species, raise awareness about its conservation status in the Adriatic Sea, and ask for your cooperation to ensure its safety.

The blue shark is one of the most widespread shark species in the world, found in all temperate and tropical oceans. It is the most common large shark species in the Adriatic Sea.

Blue sharks are elegant, long-distance travelers. They have a slender, streamlined body and are named for their distinctive, vibrant indigo-blue coloration on the back, which transitions to a bright blue on the sides. They can grow up to impressive lengths, reaching up to 5 meters. Blue sharks are true pelagic roamers, spending most of their time in the open ocean, particularly in the southern Adriatic. However, when the seawater becomes warmer after the winter months, they can occasionally be seen closer to the surface and, as in this case, even approach the coast.

Despite their size, blue sharks are generally considered not aggressive towards people. They are curious by nature, sometimes circling or even approaching divers, but incidents are exceptionally rare. This visitor in our harbor is a magnificent marine animal to be observed respectfully, not something to fear.

The situation of the blue shark is a matter of serious concern. In Croatian waters, the blue shark is a vulnerable species. Looking at the broader Mediterranean region, its status is even more critical – it is considered critically endangered. It is estimated that up to 70% of the shark species that live in or visit the Adriatic are under threat.

To protect this vulnerable species, the Republic of Croatia has given the blue shark the highest level of protection. It is listed in the national Ordinance on Strictly Protected Species and is strictly protected by law. This means its capture, disturbance, or harm is strictly forbidden.

The presence of a blue shark in our inshore waters, while rare, is a cause for both wonder and vigilance. As an organization dedicated to the research and conservation of large marine vertebrates in the Adriatic and the Lošinj-Cres archipelago, we kindly request the public’s cooperation.

· Observe, Do Not Disturb – if you see the shark again, please keep a safe distance. Do not approach, touch, chase, or otherwise harass the animal. Disturbing a strictly protected species is a legal violation.

· Report Your Sightings – each sighting is a valuable piece of data. Please report your observation to the Blue World Institute by email at info@blue-world.org or by phone at +385 (0)51 604 666. If possible, note the exact location, time, and behavior of the animal.

· Spread Awareness, Not Fear – please help us change the narrative. Sharks are not man-eaters; they are vital, ancient guardians of our seas. Their presence is a sign of a healthy marine ecosystem.

Thank you for cooperation and respect for our precious Adriatic natural heritage!