A turtle we treated 10 years ago was found in Spain!
“Castello” is a male Loggerhead turtle (Caretta caretta) that was brought to the ARCHELON Rescue Centre on May 31, 2014 from Antirio, with a serious head injury. After 380 days of care, he was deemed ready to return to the wild and was released on June 15, 2015 from Palaia Fokaia, along with two identification tags.
On December 29, 2025, after 3,850 days (10.5 years!), Castello was found in the Balearic Sea and transferred to the CRAM Rescue Center in Barcelona. During the examination, it was found that he had a hook in his mouth, as well as an old, healed wound on his lower jaw. Importantly, both identification tags remained in place, allowing direct communication between the two Rehabilitation Centers and information on the turtle’s history.

The distance traveled by Castello from Greece to Spain is estimated at approximately 2,100 kilometers (as the crow flies) and is the longest distance recorded for a rehabilitated turtle from ARCHELON’s Rescue Centre. Previous records included turtle recoveries in Cyprus (~970 km) and Israel (~1,200 km).
Castello’s story confirms that sea turtles released from our Rescue Centre are fully rehabilitated, capable of undertaking large migrations and continue to fulfill their critical ecological role in the Mediterranean.
Adopt a turtle currently under treatment and help it return to the sea!
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RECENT NEWS
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In mid-July, we received a video of an impressive sea turtle that had been caught in the nets of a fishing boat.
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ARCHELON invites you to a unique experience of environmental education and scientific observation!
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Protecting loggerhead sea turtles contributes to maintaining the balance of marine ecosystems.
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Two cases of environmental law violations in Zakynthos that went unpunished.
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New Sea Turtle Protection Project in Corfu
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With the completion of the “TUI Turtle Aid Greece” project, ARCHELON presents impressive results in nest protection, the hotel employees training and raising awareness among 66,000 tourists.
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Effective turtle conservation begins with safeguarding the nesting beaches
Field surveys were carried out over two consecutive nesting seasons (2024–2025), assessing 167 nesting beaches across Greece, covering 270 km of coastline.
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ARCHELON expresses its sorrow at the loss of Mona Khalil
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The world of marine megafauna: New Photo Exhibition at Agiannakis Environmental Station
The Exhibition is part of the LIFE MareNatura Project and is open to the public every Saturday 18:00 - 21:00.
- OUR NEWS16/06/2026
New data reveals that sea turtles follow much more complex migration strategies
World Sea Turtle Day is an opportunity to celebrate our achievements, but also to remember why we continue to research and protect these ancient ocean travellers.

