Photo of the day (86): Scyllaea pelagica

Scyllaea pelagica is a species of a nudibranch.

When I saw this sea slug for the first time, it resembled a floating rag to me. A very small floating rag. It is even waving in the water and it will bent easily in the smallest water current.

Scyllaea pelagicaScyllaea pelagicaI suppose that such appearance gives to a slug an advantage against predators. The brown coloration gives a resemblance to surroundings between the Sargassum brown algae. Its waving is a cryptic behaviour. Those are two ways of a camouflage.

Its constant movement and bending in every unobvious angles is a challenge for taking photos of this sea slug.

Its body length can reach up to 45 mm. My specimen comes from southern Croatia. The whole distribution of this species is large, because it can be found in all tropical and temperate seas. It is the only species from the family Scyllaeidae in Mediterranean Sea.

Let’s taken a closer look in a clearer position. Right side view of the Scyllaea pelagica heading right:
Scyllaea pelagicaLeft side view of the Scyllaea pelagica heading left:
Scyllaea pelagicaIts rhinophores are very small and they are hidden in rhinophore sheaths. Its head with mouth and with rhinophore sheaths looks like this from underside:
Scyllaea pelagicaThere are two pairs of lobes on its dorsal part of the body. Underside view:
Scyllaea pelagicaThere are also visible dendritic gills on the dorsal part and between lobes. Gills are transparent or white in color.
Scyllaea pelagicaThere is a genital pore on the right side of the body. It lies in front of the first pair of lobes. There is also anus on the right side of the body. It lies between those lobes.
Scyllaea pelagicaThere are also beautiful blue spots on the sides and on the dorsal part of the body.

Where are eyes? I found no eyes in my photos. I am also not sure what exactly are orange like structures inside the body of the slug.

References

Rudman, W.B., 2004 (March 10) Scyllaea pelagica Linnaeus, 1758. [In] Sea Slug Forum. Australian Museum, Sydney.

Cataneo-Vietti R., Chemello R. & Giannuzzi-Savelli R. (eds.) 1991 Atlas of Mediterranean nudibranchs. Atlante dei Nudibranchi del Mediterraneo. La Conchiglia, Roma, page 22 (only mention its occurrence and nothing more).

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Photo of the day (85): dress with cowries

This is a Native American woman’s dress with cowrie shells.

The dress is on display in the Náprstek Museum of Asian, African and American Cultures in Prague. It is a part of the temporary exhibition Indians in 2017-2019.

dress with cowrie shellsIt is a woman’s dress made of cotton. The bodice is decorated with six lines of cowrie shells (family Cypraeidae). They are probably shells of money cowrie Monetaria moneta, that is the most common cowrie.

dress with cowrie shellsThe dress is from the first half of the 20th century. It comes from the Western Plains Indians. According to the Museum staff is was made by Crows or by Cheyennes. Shells comes from the Indo-Pacific tropical waters and therefore they were imported to the Great Plains.

There is also a belt made of hide and of cloth. There were used porcupine quills in the embroidery of the belt:
dress with cowrie shellsSuch cowries decorations were used also by other Native American tribes, including for example Sioux. Decorating by Crows with elk teeth looks very similar. Elk teeth were probably used in times when cowries were not available yet.

The same style of the dress is shown for example on this 1904 photo:

Cheyenne baby in dress with cowrie shells

1904 photo of Cheyenne baby by American photographer Jessie Tarbox Beals (1870-1942). Public domain. It comes from the website of Missouri Historical Society.

It depicts the Cheyenne baby. There are only four rows of cowrie shells. It seems that there are money cowrie Monetaria moneta shells too, but there are also some ring cowrie Monetaria annulus shells on the right sleeve and on the right part of the dress (on the left part on the photo).

References

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