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“Hey, wait! What the heck?” This is what you may be saying after yesterday’s post, which featured an unlabeled picture of a mystery sea creature (above).

Well worry no more! The mysterious creature is a “sea mouse”, the colloquial name for a genus of polychaete worms which live in the Atlantic Ocean (and the Mediterranean Sea).  The proper genus name for the sea mouses (mice?) is Aphrodita, after the Greek goddess of love (apparently some exceedingly lonely 18th century taxonomists thought the furry oval sea animal with a ventral groove along its bottom resembled the sacred goddess of sexuality in some generative aspect).

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Sea mouses (mice?) are scavengers which feed on the decaying bodies of marine animals [probably: a few sources thought they were hunters].  They live close to shore in the intertidal zone where they creep and burrow as they try to find carrion and avoid predators. To my mind, their English name is vastly better than their scientific name since they scurry furtively across the ocean bottom and since they are covered in what superficially looks like scraggly hair.  This “hair” is more properly called setae—bristles which protect the worm and or help it to hide or communicate.  The setae around the edges of the mice are covered with photonic crystals so they look drab from most angles but sparkle like gorgeous blue/green/gold opals when held a certain way.

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Speaking of bristles, sea mice move by means of parapodia—bristly appendages which serve as feet and which also look somewhat like hair. The creatures measure from 7–15 centimeters (3–6 inches) long; however, some giants can grow to a length of 30 centimeters (12 inches).

The febrile imaginings of long dead natural scientists aside, sea mice (mouses?) are all hermaphrodites with both male and female gonads and sexual organs [probably…different sources disagreed upon their gender orientation, and given today’s social mores, it was thought impolite to inquire].  The worms are incapable of fertilizing themselves though.

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Of course, some of you might still have some questions about this living technicolor hermaphroditic toupee which crawls around on the ocean bottom eating horrible dead things, but I can help you no further.  My limited knowledge of sea mice is all used up.  They aren’t even mollusks (they are more closely related to…well to us…than to clams and squid). Based on the many bracketed addenda and the numerous weasel words in this article, our understanding of these things is pretty superficial. If you want to make a name for yourself in marine biology this may be your chance, provided you can spend a lifetime underwater watching polychaete worms eat and make love!

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DeBrazza’s monkey (Cercopithecus neglectus) Photo by In Cherl Kim

So far, Primate Week has been a huge success! The Year of the Fire Monkey has featured the loudest land animal, the immortal magician monkey god, and the disconcerting calculus of Dunbar’s number. There is still another topic which I wanted to address—an important primate post which I have planned to write for a long time–but it is almost midnight on Friday night, so I am going to bunt with a quick gallery post about color. Last week I wrote a piece about humankind’s love for the color red. I blithely assured everyone that primates are the most colorful mammals…however I didn’t back that up with any images.

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Northern owl monkey (Aotus trivirgatus) photo by Mogens Trolle

Therefore, here are some beautifully colorful primates. I am only listing the species and the source (where available) so that you can revel in the beautiful color of these monkeys. If you want to learn what these colors betoken and how each species evolved such lovely patterns, you will have to look elsewhere. I have done my best to label each picture, but the WordPress function which allows a a blog’s creator to label images has been broken a long time (at least for the template I use). If you have any questions, just ask in the comments!

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The mandrill (Mandrillus sphinx)

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The Golden Langur (Trachypithecus geei)

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The golden snub-nosed monkey (Rhinopithecus roxellana)

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Emperor Tamarin (Saguinus imperator)

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Bald-headed uakari (Cacajao calvus) photo by Luis Louro

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Zanzibar Red Colobus monkey (Procolobus kirkii) Olivier Lejade

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Golden lion tamarin (Leontopithecus rosalia)

 

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Red-shanked douc (Pygathrix nemaeus)
It is a pretty intense rainbow! Look at how expressive their faces are. It is possible to read the personality of each monkey. Some of them remind of acquaintances from secondary school or world leaders, but of course we humans are not quite so colorful. Still we can pull off a mean combination of orange pink and brown in our own right. We also change colors somewhat when we are aroused, angry, or afraid! Colorful mammals indeed!

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Human (Homo Sapiens) photo by Luis Aragon

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