The article mentions that they typically prey on Weddell seals in this manner, but have now adapted this form of attack to go after Leopard and Crab seals, whic

The article mentions that they typically prey on Weddell seals in this manner, but have now adapted this form of attack to go after Leopard and Crab seals, which make less use of floes and are "more feisty". It does not say how these attacks have been adapted.