If this is the jelly they get in Australia, it’s no wonder so many prefer Vegemite.
Wikipedia claims that these dolphins have “a form of sonar known as echolocation.”
I had thought that all types of sonar use echolocation, so I looked it up. Apparently only *active* sonar is known as echolocation. There is also a passive type of sonar.
Granted, most people call passive sonar “listening”, but whatever. I’m not going to fight about it.