Fish intelligence in paradise fish ("Macropodus opercularis") which avoid places where they have experienced a single attack by a predator and continue to avoid for many months. A number of studies have shown that fish can retain information for months or years. Anecdotally, channel catfish ("Ictalurus punctatus") can remember the human voice call announcing food five years after last hearing that call. Goldfish remember the colour of a tube dispensing food one year after the last tube presentation. Sockeye salmon still react to a light signal that precedes food arrival up to eight months since the last reinforcement. Some common rudd and
Wooden fish wooden fish is simpler in shape and no design is carved onto the fish. It is more oblong in shape. It has a handle for easy carrying during portable uses. The Korean versions of a wooden fish are different in the sense that they provide a deeper, more wooden-like hollow sound when struck. The original type of wooden fish is literally in the shape of a fish. Along with a large temple bell and drum, It is found suspended in front of Buddhist monasteries. When proceeding with various duties (such as eating, lectures, or chores), a monk and a supervisor