|[Note Guidelines] Photographer's Note|
|How do they swim so close without colliding?|
A complex combination of senses allows fish to achieve those smooth schooling movements we marvel at. At one time it was believed there was a leader in the school, who directed the movements. However, it is now known that each fish responds to the movements of the other fish, and even stimuli such as pheromones. If one fish moves in a different direction all the others sense it and move accordingly.
Even though 80 percent of all fish school at some point in their lives, there are a number of fish that live solitary lives. As a rule smaller fish are more likely to live out their lives in schools, although even large fish will school together. Furthermore, not all fish that school do so for protection in numbers. In fact some of the fiercest fish in the world live in schools. Piranha fish live in large schools that they are born into. Although they tolerate their brothers and sisters, a new piranha attempting to join the school later is often attacked and killed.
Cropped and sized in Adobe.
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