The Procellariidae – Shearwaters+ or Procellariidae – Petrels & Shearwaters are the ‘true Petrels’ and are a large family of pelagic, medium sized species of Type – seabird found across all the Oceans of the World. They are characterized by their tubular nostrils, hooked beaks and long pointed wings. They are in the Order Procellariiformes. A list of the sub-families in Procellariidae – Shearwaters+ is given below.
Procellariidae - Shearwaters+ contains the following sub-families Shearwaters Shearwaters+ Petrels Fulmars Shearwaters fishing underwater - youtube.com