The sandbar shark is the only shark species that has learnt to ingest air from the surface and store it in its stomach. In this

The sandbar shark is the only shark species that has learnt to ingest air from the surface and store it in its stomach. In this way, the sandbar shark is neutrally buoyant - it no longer needs to move to keep itself in the water column. Thus, despite its size, the predator is perceived by others as nothing more than an obstacle. But when the victim approaches, the first sound it hears is the clacking of its jaw. Источник: Global News (EU, USA)