In Australia, sharks use Twitter to warn swimmers if they're within a kilometer of the shore. Surf Life Saving Western Australia, or SLSWA, has outfitted over 320 sharks of varying species, including great whites, with tags that transmit a signal to monitors when the reach the required distance from shore.
The shores of Western Australia are the most dangerous in the world when it comes to shark attacks. The Twitter account is a fast and highly accessible way to distribute and access the information necessary for the public to make an informed decision about going into the water in that area. Sharks using Twitter may not be the most accurate description of this technology, but it is essentially what the SLSWA have done in order to increase public safety and awareness.