"The noisy reef takes us
under the waves to the reefs of New Zealand to explore sound and noise
under water. Using this unique habitat, we look at what sound is, how it
travels, what changes under water and how animals use sound in their
world.A key idea within this context is that animals can use the sounds of the reef to navigate. Fish and crab larvae floating in currents several kilometres from shore need to find their way back to the reef before they settle and metamorphose into the adult form. We know that smell and light are important in this process, but for the first time, scientists in New Zealand have evidence that sound is also used as a navigation tool. Larval crabs are attracted to the sound of a healthy reef and will use this to find their way home. [...]" http://www.sciencelearn.org.nz/Contexts/The-Noisy-Reef/NZ-Research/The-Noisy-Reef
