The concept of Bank of fish designates the set of similar fish that do not necessarily have to be of the same species, such is the case of tuna and sardines, to name a few, and that are characterized by swimming in a synchronized and concentrated way. Popularly, it is common for the concept to appear designated as shoal.
The most notable feature of a school of fish is the similarity of those who compose it. Fish use many tricks to align themselves with those "companions" that are similar in size, species, health, origin and affinity. This tactic of moving together with their almost equal peers has a special effect that in the event of encountering a predator, no member of the bank is appreciated with a predilection over the rest, that is, the aforementioned technique facilitates homogenization and therefore " distraction from the predator on duty. "
Now, it is worth mentioning that this ability to associate with other similar fish is not a skill with which the fish is born, but that it will learn it, an explanation of this is found in that the fish cannot perceive its own color, then , tends to associate with those that it perceives as similar and with those that at some point it was successfully integrated.
It should be noted that mobilization in this way provides numerous advantages to animals that do so, in this particular case, to fish, it helps them protect themselves from predatory species, perfects their own predation, increases their hydrodynamic efficiency and facilitates their encounter. with colleagues, among the most prominent.
Among the most common movements made by schools of fish are the migratory , which consist of the displacement from one place of origin to another of destination and which will imply a change in the usual habitat. These can be periodic, seasonal or permanent in time.
