| http://www.w3.org/ns/prov#value | - Various sounds, signals, and other means of communication are employed by fishes.{26} Some indicate their emotion by changing color.{27} The California singing fish hums to attract a mate.{28} Groupers can alarm skin divers with their booming sounds.{29} Using electrical signals, elephant fish may have the fastest known form of communication, with a response time of about 12 milliseconds. (Proport
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