Sea mouse
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Aphrodita
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| Aphrodita aculeata |
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- For the Ancient Greek goddess see Aphrodite.
The sea mouse, Aphrodita aculeata, is a marine polychaete worm found in the North Atlantic, the North Sea, the Baltic Sea and the Mediterranean. The sea mouse normally lies buried head-first in the sand. It has been found at depths of over 3,000 metres (9,800 ft).[2]
Etymology
The name of the genus is taken from Aphrodite, the Ancient Greek goddess of love. This is because, when viewed ventrally, the animal resembles a human female's genitalia. The English name may either have a similar meaning, or may derive from the supposed resemblance to a bedraggled mouse when washed up on shore.[3] The specific name aculeata is the Latin for spiny.
Description
The body of the sea mouse is covered in a dense mat of setae (hairlike structures).[4] Adults generally fall within a size range of 7.5 to 15 centimetres (3.0 to 5.9 in), but some grow to 30 centimetres (12 in).
Structural coloration
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The spines, or setae,[4] on the scaled back of the sea mouse are one of its unique features. Normally, these have a deep red sheen, warning off predators, but when the light shines on them perpendicularly, they flush green and blue, a "remarkable example of photonic engineering by a living organism". This structural coloration is a defense mechanism, giving a warning signal to potential predators. The effect is produced by many hexagonal cylinders within the spines, which "perform much more efficiently than man-made optical fibres".[5]
Feeding
The sea mouse is an active predator[2] and scavenger,[4] feeding primarily on small crabs, hermit crabs and other polychaete worms including Pectinaria and Lumbriconereis.[2] It has been observed consuming other polychaete worms over three times its own body length.[2] Feeding activity takes place at night, with the animal partially buried in sand.[2]
References
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- Sea Mouse images
- A Natural Photonic Crystal
- MarLIN: Sea mouse
- BIOTIC Species Information for Aphrodita aculeata
- ↑ WoRMS: Aphrodita aculeata Linnaeus, 1758
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