What is a group of Hardheads called?

A group of hardheads is commonly called an Obstinacy.

Collective nouns are words used to describe a group of individuals of the same species. In the case of hardheads, a popular type of saltwater fish found in Australian waters, collective nouns are often used to add a touch of creativity and vividness to language when referring to these aquatic creatures. One collective noun for hardheads is a "school," emphasizing the large groups these fish often swim in as they navigate the waters along the Australian coastline. When observing a school of hardheads, you can witness their synchronized movements, shimmering scales, and a cohesive presence that showcases the power of unity in their numbers. Another popular collective noun for hardheads is a "shoal," emphasizing the loose congregation formed by these fish. When a shoal of hardheads is spotted, it gives the impression of countless individuals congregating together to seek safety, find food, or mate. Onlookers are often astounded by the sheer size and dynamic nature of a shoal, as it is captivating to see these agile creatures beautifully swimming in harmony, creating patterns and captivating displays. Lastly, a collective noun for hardheads that highlights their swift and purposeful movements is a "dart." Just as the name implies, a dart of hardheads captures the quick motion and agility exhibited by these fish. Darts can disperse or come together seamlessly, effortlessly gliding and changing direction in perfect sync. Witnessing a dart of hardheads swimming magnificently in unison can evoke a sense of awe and admiration for the splendid choreography displayed by these captivating aquatic creatures. Collective nouns for hardheads, such as school, shoal, and dart, amplify their remarkable behavior and picturesque charisma, demonstrating the beauty of their interactions as they traverse the vast ocean depths.