Antarctic Petrel - The Antarctic Petrel is the only known species in the genus Thalassoica, and is a member of the Procellariidae family, and the Procellariiformes order. Also, this Petrel along with the Snow Petrel, the Cape Petrel, both Giant Petrels, and the two species in the Fulmarus family, are considered to be a separate group from the other Procellariidae members.