Is bluefin tuna nocturnal or diurnal ?

Bluefin tuna are primarily diurnal, meaning they are more active during the day. They tend to swim near the surface in search of food when the sun is up, taking advantage of their keen eyesight to spot prey like smaller fish and squid. However, they can also show some nocturnal behavior, particularly in deeper waters, where they may hunt under the cover of darkness. Even though bluefin tuna favor daylight hours for hunting, they are incredibly adaptable creatures. They can change their behavior based on feeding patterns and predator avoidance, showcasing their impressive survival instincts. So, while they shine brightest during the day, they'll slide into the twilight if they need to!