Posts Tagged ‘bioluminescence’

Some animals are capable of producing their own light, termed bioluminescence. Reasons for creating this light vary from attracting mates (e.g. fireflies) or prey (e.g. angler fish), for camouflage (e.g. the cookiecutter shark), and to warn off predators (e.g. firefly larvae), and it can be pretty spectacular – check out this fascinating BBC’s Blue Planet footage:

One interesting example is a marine snail, Hinea brasiliana that lives in the intertidal zone (the area that is underwater at high tide, but exposed at low tide). The snail produces blue-green light from cells within two patches on its body – which, unusually, are hidden within the opaque shell that protects the snail’s soft body from predators. This would usually totally negate the point of bioluminescent – if nobody else can see it, what’s the point in emitting light flashes? Research by Deheyn and Wilson, however, has shown that the snail gets around this problem by having a specially adapted shell. It specifically allows light in the blue-green spectrum to pass through it and also diffuses the light, so that the shell is lit up. The researchers think that the snail’s light flashes may act as a deterrent to predators – while its clever shell may prove to be useful  in directing the design of future human-made light diffusing materials.


DD Deheyn and NG Wilson. 2011. Bioluminescent signals spatially amplified by wavelength-specific diffusion through the shell of a marine snail. Proceedings of the Royal Society B 278: 2112-2121

Read Full Post »