Silkies and tunas (IMAGE) Save Our Seas Foundation Caption A threatened species. The tendency of silky sharks to associate with schools of tuna species and floating objects makes them especially vulnerable to industrial tuna fleets that fish around drifting fish aggregation devices. Credit Pelayo Salinas de León Usage Restrictions Photographer to be credited for image License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.