Evolutionary Trick

Shining sea snails


The marine snail Hinea brasiliana produces bright green flashes of light as an alarm when other creatures rub past its shell. Also known as the clusterwink snail, the H. brasiliana can typically be found in tight groups at rocky shorelines. When something startles the snail, it retreats into its shell and produces a flashing light, which pulsates once every hundred milliseconds or less. Researchers at the Australian Museum in Sydney theorize that this light response may allow the animals to communicate while remaining safe inside their hard shells.
Source: Live Science