The life habits of tuna are very unique. They have remarkable group characteristics, often forming schools of individuals of similar size and age, ranging in size from dozens to thousands. Groups are good for predation, and the collaboration of members can drive prey to small areas, improve predation efficiency, and is also crucial in defense against predators and reproduction, which enhances the group's ability to survive.

In terms of diurnal activities, tuna are mostly found in the middle and upper layers of the water column during the day, foraging with good vision and swimming flexibly according to light and food distribution. At night, some of them swim to deeper waters, either to avoid predators or because there are more nocturnal prey in the deeper layers, but some individuals stay in shallow waters to continue feeding.

Tuna have a certain degree of adaptability to environmental change, and will migrate when environmental factors change drastically, such as encountering pollution or red tides, and then quickly withdraw. However, if environmental changes are drastic and long-lasting, they can affect their survival and reproduction, resulting in slow growth and reduced reproduction rates, which can threaten the continuation of the population. These habits are survival strategies that have evolved in the complex marine environment and are important for maintaining population size and ecological balance.