Sea Mouse

admin
, 21 November 2024
Sea Mouse
Sea Mouse © Barry Yates

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

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Comments

  • Christine Randell:

    Thank you really interesting

    28 Nov 2024 11:56:00

  • Sussex Wildlife Trust:

    Pleasure!

  • Tim Nichols:

    Educational

    28 Nov 2024 13:58:00

  • Rosalie:

    Utube does not open.

    28 Nov 2024 19:42:00

  • Sussex Wildlife Trust:

    You can watch the film on YouTube here

  • Louisa Pretorius:

    Wonderful 😊 nature is full of amazing surprises

    29 Nov 2024 07:49:00

  • Beryl Ferrers-Guy:

    mst interesting

    29 Nov 2024 17:03:00

  • Sue McRae:

    What an amazing creature and even more so that scientists are only just beginning to understand its sophisticated light-manipulation technology. Equally amazing that the Sea Mouse is so common, it’s just that we don’t often come across it. Well done, whoever found the one at Rye Harbour NR.

    29 Nov 2024 18:00:00

  • Susan Dennis:

    Fascinating. I’ve never heard of such a creature.
    Thank you

    30 Nov 2024 08:22:00

  • Andrew:

    Recently found one washed up on Barton on sea beach (Hants) , after a storm, it was deceased and a bit beaten up but i have a photo of its underside (and innards!!) , I posted this photo with others on my Instagram feed: @misteralane yesterday 16/1/26 …A friend researched and found this article so thanks for satisfying my curiosity!!!

    17 Jan 2026 15:39:00

  • Andrew:

    Recently found one washed up on Barton on sea beach (Hants) , after a storm, it was deceased and a bit beaten up but i have a photo of its underside (and innards!!) , I posted this photo with others on my Instagram feed: @misteralane yesterday 16/1/26 …A friend researched and found this article so thanks for satisfying my curiosity!!!

    19 Jan 2026 17:05:00

  • Sussex Wildlife Trust:

    Thank you!

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