What's the noun for gannet? Here's the word you're looking for.
gannet
Any of three species of large seabird in the genus Morus, of the family Sulidae. They have black and white bodies and long pointed wings, and hunt for fish by plunge diving and pursuing their prey underwater.
“The Science article includes a picture of the gannetry on Bird Island, the largest in the world, by a Port Elizabeth photo-journalist and author.”
“Today it's the world's largest single rock gannetry with 40,000 pairs returning to breed each year.”
“The off-shore islands, which are part of the estate, provide sanctuary for several world-famous bird colonies including the exceptional Eilean Dubh gannetry.”