Scientists from the Marine Organism Biology Institute (Ibiomar-Conicet) have made a groundbreaking discovery by documenting for the first time the gastric incubation of offspring in the starfish species Asterina fimbriata, found in southern Patagonia, Argentina, and Chile. Unlike most echinoderms, which release their gametes into the water column for external fertilization, this starfish exhibits a rare reproductive behavior by incubating its young internally, specifically in its stomach.

The species Asterina fimbriata is characterized by its small size, residing in intertidal zones and reaching depths of nearly 300 meters. This research reveals that only 8% of female starfish of this species manage to reproduce, emphasizing the exceptional nature of their reproductive strategy. The study highlights unique adaptations in marine species, offering insights into the ecological dynamics of the region and the importance of conservation efforts in these sensitive habitats.

This discovery not only adds a new dimension to our understanding of starfish behavior and reproductive biology but also underscores the critical need for further research into marine life in southern Patagonia. As environmental changes threaten these ecosystems, understanding the reproductive strategies and challenges faced by species like Asterina fimbriata becomes increasingly important for their conservation and the health of marine biodiversity in the region.