1.Schooling behaviour: Fish that swim in schools often move in synchrony, following the movements of the fish in front of them. While this behaviour helps them stay cohesive and protected from predators, it can also lead to accidental collisions if the fish suddenly change direction or encounter an obstacle.
2.Limited visibility: In some cases, fish may have limited visibility due to factors such as murky water, low light conditions, or obstructions in their environment. This can make it more difficult for them to see and avoid each other, leading to accidental collisions.
3.Rapid movements: Certain fish species may engage in rapid movements or burst swimming, especially when hunting or escaping from predators. During these fast-paced manoeuvres, fish may have less time to react and avoid collisions with other fish in their vicinity.
4.Competition for resources: In highly competitive environments, fish may compete aggressively for food or territory, resulting in chases and collisions. This behaviour is commonly observed during feeding frenzies or when fish are defending their nests or territories.
5.Environmental factors: Sudden changes in environmental conditions, such as strong currents, turbulence, or waves, can disrupt the normal swimming patterns of fish and make it more challenging for them to maintain their stability and avoid collisions.
6.External stimuli: External stimuli, such as loud noises, vibrations, or bright lights, can startle fish and cause them to react abruptly, potentially leading to collisions with nearby objects or other fish.
Overall, while fish collisions are not an intentional behaviour, they can occur due to various factors related to their environment, natural behaviour, and external stimuli.