Animals as varied as sharks, salamanders, and duck-billed platypuses can detect electric fields around them, while some fish, including the South American knifefish and various species of African elephantfish, can actually generate unique, complex electric fields, which they use to communicate information about their social status, sex, and dominance position within their social group.
Could animals like these exist in space? On a celestial body with completely dark oceans, such as Saturn’s moon Enceladus, our notion of evolution would support this method of communication, leading us to believe that aliens on such a planet might concoct their language out of electric signal
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