These birds are called Little Black Cormorants and at full size are between 60-65cm. This is a family and the young juvenile has a softer brown head. As part of the cormorant and darter family they have the long necks, long tails and short legs which have four toes joined by web. They were sitting on an island of rocks off the base of Look At Me Now Headland which is part of Moonee Beach Nature Reserve waiting to spot fish. They can swim low in the water and dive for fish and yabbies (the latter when fishing in fresh water). They are common across most of Australia save the inland west/south desert region and build bulky stick nests over water laying 3-4 pale green eggs. They usually prefer fresh water and avoid unsheltered marine situations that are favoured by their cousin the Great Cormorant but he has a distinct yellow face.
Note: I changed the picture after a couple of ‘likes’ as I didn’t think the original posted well, as you can see I was zooming from quite a distance, I hope that doesn’t confuse anyone. Cheers. Margo