Dolphin Voices in the Sea is one for all the lovers of marine life. This lovely web based app is a bit dated but still delivers the goods with intriguing tidbits on different species of dolphins and spectograms of dolphins communicating with each other in the wild.
The website features videos and scientists talking about their research efforts and offering the latest insights into dophin behaviour and conservation.
Although targeted towards children and teens I found the application and learning tool interesting and engaging for anyone interested in marine ecology and zoology.