Atlantic bluefin tuna

The Adriatic was historically a major bluefin tuna spawning ground, and while populations crashed through the 20th century, Atlantic-wide quota management since 2010 has produced a measurable recovery. Bluefin now occasionally pass the Tremiti group in summer on their way to and from Adriatic spawning areas — fast, deep, blue-water animals that appear suddenly at the pinnacle edge and are gone in seconds. A sighting here is never guaranteed but is no longer rare.