Using sonic vibrations pulsating through the water they are able to communicate complex ideas such as anger or sadness. Some have even been known to locate each other through magnetic fields across vast aquatic distances.
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They have many different signals they make to one another with their body language. They nod, flash, flick and flutter different fins, square up and even waggle at times. Having a double lateral...
No way. they are far below us on the evolutionary scale. Some people do not even consider fish to be real pets, as no tactile contact ( as Petting implies) is normally possible.