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Goldfish have a memory-span of at least three months and can distinguish between different shapes, colors, and sounds. [ 33 ] [ 34 ] By using positive reinforcement , goldfish can be trained to recognize and to react to light signals of different colors [ 35 ] or to perform tricks. [ 36 ]
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. [19] Goldfish remember the colour of a tube dispensing food one year after the last tube presentation. [19]
Most people showing amazing memory abilities use mnemonic strategies, mostly the method of loci. This includes all winners of the annual World Memory Championships and most of the known scientific cases of excellent memories, like Solomon Shereshevsky. Regardless, the following list contains people who have claimed photographic memory. [4]
Although many people believe that the memory of a goldfish spans three seconds, its memory can actually span several months. In fact, goldfish are much smarter than we might think. In fact ...
Exceptional memory is the ability to have accurate and detailed recall in a variety of ways, including hyperthymesia, eidetic memory, synesthesia, and emotional memory. Exceptional memory is also prevalent in those with savant syndrome and mnemonists .
Why Do Elephants Have Good Memories? Scientists believe elephants use their long-term memory to remember faces (friends or enemies) and places to boost their chances of survival. ©Paul Hampton ...
Baby Cheddar Goldfish: Good things come in small packages. (Campbell's) These are cute, but essentially the same cracker as the Cheddar, just very slightly smaller.
Diagrammatic vertical section through the eye of teleost fish. Fish have a refractive index gradient within the lens which compensates for spherical aberration. [4] Unlike humans, most fish adjust focus by moving the lens closer or further from the retina. [5] Teleosts do so by contracting the retractor lentis muscle.