By Sarah Watson
Events Officer at Rye Harbour Nature Reserve
The Sea Mouse (Aphrodita aculeata), a chunky marine worm, is about 15 cm long and rarely seen by people. However, winter storms can occasionally wash these creatures up on the high tide line.
This one was found at Rye Harbour Nature Reserve and returned to the sea. A closer look reveals a shimmering, iridescent fringe among its duller bristles. Scientists have discovered that the Sea Mouse employs remarkable 'photonic engineering' – a sophisticated light-manipulation technology that humans are only beginning to understand.
The worm's bristles are uniquely structured to reflect light in a precise manner. Researchers believe this colourful display serves as a defence mechanism, deterring predators in the dark, murky environment of the seabed.
Adult Sea Mice are mobile and widespread in UK waters. Living from the low-tide mark to depths of around 200 metres, they remain largely invisible to casual observers. Occasionally, they are found washed ashore after storms or stranded during low tides. As seabed predators, they hunt among muddy sand, feeding on small crabs and other worms.
The video is sped up 3x faster than real life, after about the first five seconds, because clever engineering aside, Sea Mice are rather slow!
Flim © Barry Yates
This post is also available on Sussex Wildlife Trust website
