Hopefully the depopulation of the dolphin species (http://en.wikipedia.org/wiki/Dolphin_drive_hunting http://en.wikipedia.org/wiki/Dolphin_drive_hunting) has no

Hopefully the depopulation of the dolphin species (http://en.wikipedia.org/wiki/Dolphin_drive_hunting http://en.wikipedia.org/wiki/Dolphin_drive_hunting) has not caused significant loss of any complex language developed over time. [In response to responder: Actually I think developing complex language with something like this would be relatively easy. With human language we can't just show a series of events with our words, people need to experience the things with us and then we develop common words to describe them again later. With their system of communication it seems that they could describe pretty much anything they'd find notable and also easily abstract things by just making their clicks less specific or by blending a few specific examples as a form of abstraction. Actually I'd bet on blending first, maybe even a literal superposition of all the possibilities or several of them. Also they might be able to communicate by acting things out physically while they are sounding things out. The combination could be pretty powerful for expression.]