Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Sea animal has grow-again penis
Phys.Org ^ | 02-13-13 | Staff

Posted on 02/13/2013 10:51:57 AM PST by Red Badger

Scientists reported Wednesday on the bizarre sex life of a sea slug that discards its penis after copulation. Then grows a new one.

"No other animal is known to repeatedly copulate using such 'disposable penes'," Japanese biologists wrote in the Royal Society journal Biology Letters, describing the behaviour as "extremely peculiar". Dubbed Chromodoris reticulata in Latin, the red-and-white slug—technically a shell-less mollusc—inhabits warms waters in Southeast Asia. The critter needs 24 hours between couplings to unroll an internally coiled and compressed juvenile penis to replace the used, external bit, the scientists found. It can repeat this feat at least three times. The human thumb-sized slug is an hermaphrodite, meaning it has both male and female sexual organs. The animals perform dual sexual roles during copulation. They give sperm to a mating partner while simultaneously receiving sperm, which they store for later insemination. The team observed copulation between sea slugs that they had captured during scuba dives and held in a tank. After each coupling, which lasted between dozens of seconds and a few minutes, every slug discarded its penis—a thread-like organ that it projects from its side into a partner's vagina. The team also examined the microscopic structure and function of the male organs—observing an internal spiral structure they believe grows into a replacement penis. "We propose that the tissue at the spiral part of the penis is compressed and undifferentiated, gradually differentiating into the 'next penis'," the team wrote. "It may need approximately a day for the spiral structure to be ready for copulation." In another revelation about the sea slug's sex life, the scientists found its penis was covered with spines—and suggested these may be used to remove the sperm of previous partners being held in store by their mate. The spines are backward-pointing, making it difficult to withdraw the penis after copulation. This may explain the organ's disposable nature.

"Chromodoris reticulata may compensate for the short-term cost of decreased reproductive opportunities caused by the loss of a penis with the reproductive advantage gained by sperm displacement," wrote the study authors. Various animals are known to discard parts of their body, such as the gecko which sheds its tail. Few, though, are willing to part with their penis, the team noted with clinical understatement.


TOPICS: Pets/Animals; Science; Weird Stuff
KEYWORDS: marinebiology; napl
Navigation: use the links below to view more comments.
first 1-5051-53 next last

Two sea-slugs (Godiva banyulensis) from the Glaucidae familia swim in the Mediterranean sea, 29 July 2004, off the town of Kas, Turkey. Scientists reported Wednesday on the bizarre sex life of a sea slug that discards its penis after copulation. Then grows a new one.

1 posted on 02/13/2013 10:52:02 AM PST by Red Badger
[ Post Reply | Private Reply | View Replies]

To: Slings and Arrows; Lazamataz; martin_fierro

Disposable Penis Ping!...........


2 posted on 02/13/2013 10:53:39 AM PST by Red Badger (Lincoln freed the slaves. Obama just got them ALL back......................)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger

Penis-discarding-hermaphodites, UNITE!

You have nothing to lose but your....

(Soon to become a protected group!)


3 posted on 02/13/2013 10:55:59 AM PST by left that other site (Worry is the darkroom that developes negatives.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger

Why does a particular song by King Missile immediately spring to mind?


4 posted on 02/13/2013 10:56:10 AM PST by AnAmericanAbroad (It's all bread and circuses for the future prey of the Morlocks.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: Red Badger

Lorena Bobbit does not approve.


5 posted on 02/13/2013 10:57:11 AM PST by corkoman (Release the Palin!)
[ Post Reply | Private Reply | To 2 | View Replies]

To: AnAmericanAbroad
It’s detachable.

;)

6 posted on 02/13/2013 10:57:11 AM PST by allmendream (Tea Party did not send GOP to D.C. to negotiate the terms of our surrender to socialism)
[ Post Reply | Private Reply | To 4 | View Replies]

To: Red Badger

In before the Bobbitt comment.


7 posted on 02/13/2013 10:57:24 AM PST by manic4organic (It was nice knowing you, America.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: corkoman

Dangit. 13 seconds.


8 posted on 02/13/2013 10:58:03 AM PST by manic4organic (It was nice knowing you, America.)
[ Post Reply | Private Reply | To 5 | View Replies]

To: AnAmericanAbroad

Its called the BOBITT Slug...
actually lets get to work in this medical companies...I would buy a couple of extras just in case....


9 posted on 02/13/2013 10:58:12 AM PST by Youngman542012
[ Post Reply | Private Reply | To 4 | View Replies]

To: Red Badger

Has its own penis *and* vagina. If only...


10 posted on 02/13/2013 10:58:31 AM PST by twister881
[ Post Reply | Private Reply | To 1 | View Replies]

To: manic4organic

LOL! You didn’t make it!...........


11 posted on 02/13/2013 10:58:37 AM PST by Red Badger (Lincoln freed the slaves. Obama just got them ALL back......................)
[ Post Reply | Private Reply | To 7 | View Replies]

To: Red Badger
detachable penis
12 posted on 02/13/2013 10:58:50 AM PST by GQuagmire
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger

Cue the King Missile song.


13 posted on 02/13/2013 10:58:54 AM PST by dfwgator
[ Post Reply | Private Reply | To 2 | View Replies]

To: Red Badger
internally coiled and compressed

Shrinkage

14 posted on 02/13/2013 10:59:07 AM PST by llevrok (The only thing Obama has achieved are rapid executive orders.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Youngman542012

Do they live off the coast of San Francisco


15 posted on 02/13/2013 10:59:37 AM PST by Youngman542012
[ Post Reply | Private Reply | To 9 | View Replies]

To: dfwgator

What is this ‘King Missle’ song people are posting?.........


16 posted on 02/13/2013 11:00:06 AM PST by Red Badger (Lincoln freed the slaves. Obama just got them ALL back......................)
[ Post Reply | Private Reply | To 13 | View Replies]

To: corkoman

“Lorena Bobbit does not approve.”

In the bedroom, the upstairs bedroom, the Bobbit sleeps tonight.

In the kitchen, the downstairs kitchen, Lorena grabs a knife.

A weenie whack, a weenie whack ...


17 posted on 02/13/2013 11:01:20 AM PST by USMCPOP (Father of LCpl. Karl Linn, KIA 1/26/2005 Al Haqlaniyah, Iraq)
[ Post Reply | Private Reply | To 5 | View Replies]

To: Red Badger

See #12.


18 posted on 02/13/2013 11:01:28 AM PST by dfwgator
[ Post Reply | Private Reply | To 16 | View Replies]

To: dfwgator

I remember that from an old Beavis and Butthead heh heh...he said penis heh heh


19 posted on 02/13/2013 11:06:25 AM PST by bigbob
[ Post Reply | Private Reply | To 13 | View Replies]

To: Red Badger

Where exactly does the used one go?


20 posted on 02/13/2013 11:07:06 AM PST by ImJustAnotherOkie (zerogottago)
[ Post Reply | Private Reply | To 1 | View Replies]

To: dfwgator

That was weird, to say the least.......


21 posted on 02/13/2013 11:07:41 AM PST by Red Badger (Lincoln freed the slaves. Obama just got them ALL back......................)
[ Post Reply | Private Reply | To 18 | View Replies]

To: Red Badger

Sea animal has grow-again penis


Don’t we all?


22 posted on 02/13/2013 11:07:46 AM PST by cuban leaf (Were doomed! Details at eleven.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: ImJustAnotherOkie

Fish food........


23 posted on 02/13/2013 11:08:25 AM PST by Red Badger (Lincoln freed the slaves. Obama just got them ALL back......................)
[ Post Reply | Private Reply | To 20 | View Replies]

To: cuban leaf

Not like that!........I wonder if that gene could be transplanted.......


24 posted on 02/13/2013 11:10:07 AM PST by Red Badger (Lincoln freed the slaves. Obama just got them ALL back......................)
[ Post Reply | Private Reply | To 22 | View Replies]

To: Red Badger

I remember in my younger single days waking up, looking around, and wishing it would fall off...


25 posted on 02/13/2013 11:10:13 AM PST by montanajoe
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger
Fish food........

Do you like fishsticks?

26 posted on 02/13/2013 11:10:13 AM PST by dfwgator
[ Post Reply | Private Reply | To 23 | View Replies]

To: Red Badger; All

If they could only put this into pill form...


27 posted on 02/13/2013 11:12:13 AM PST by stevie_d_64 (It's not the color of one's skin that offends people...it's how thin it is.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: dfwgator

What part of the fish does the stick come from?.......now we know..........

(question from a current PSA on talk radio).......


28 posted on 02/13/2013 11:14:26 AM PST by Red Badger (Lincoln freed the slaves. Obama just got them ALL back......................)
[ Post Reply | Private Reply | To 26 | View Replies]

To: dfwgator

Parts is parts...


29 posted on 02/13/2013 11:14:49 AM PST by TADSLOS (The Event Horizon has come and gone. Buckle up and hang on.)
[ Post Reply | Private Reply | To 26 | View Replies]

To: Red Badger
"What...???"
30 posted on 02/13/2013 11:15:05 AM PST by AngelesCrestHighway
[ Post Reply | Private Reply | To 1 | View Replies]

To: montanajoe

Thank God for peniscillin........


31 posted on 02/13/2013 11:15:23 AM PST by Red Badger (Lincoln freed the slaves. Obama just got them ALL back......................)
[ Post Reply | Private Reply | To 25 | View Replies]

To: Red Badger

32 posted on 02/13/2013 11:16:12 AM PST by dfwgator
[ Post Reply | Private Reply | To 28 | View Replies]

To: Red Badger

This internet porn thing is getting ridiculous. Sea slugs goin at it. Sheesh!


33 posted on 02/13/2013 11:17:36 AM PST by Lurkina.n.Learnin (Superciliousness is the essence of Obama)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger

The cure for morning after remorse?


34 posted on 02/13/2013 11:38:36 AM PST by LouD
[ Post Reply | Private Reply | To 1 | View Replies]

To: LouD

Seems like it might fit Clinton’s definition of “it wasn’t sex.”


35 posted on 02/13/2013 11:49:47 AM PST by Clay Moore ("In politics, stupidity is not a handicap." Napoleon Bonaparte)
[ Post Reply | Private Reply | To 34 | View Replies]

To: montanajoe

There ya go...

Been there wished that.

Adaptive behavior at it best;you seen where they put it?


36 posted on 02/13/2013 11:53:15 AM PST by Adder (No, Mr. Franklin, we could NOT keep it.)
[ Post Reply | Private Reply | To 25 | View Replies]

To: Red Badger

Mama slug, “I told you if you kept playing with that thing it would fall off.”


37 posted on 02/13/2013 12:19:25 PM PST by dblshot (I am John Galt.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger

This reminds me of this grotesque and obscene, and funny, claymation video made years ago, which has the worst elements of some of the grosser nature movies of yore.

“Reproduction Cycle In Lower Life Forms Under the Rocks of Mars”

http://www.youtube.com/watch?v=SRJMijBzjwo


38 posted on 02/13/2013 12:32:17 PM PST by yefragetuwrabrumuy (Best WoT news at rantburg.com)
[ Post Reply | Private Reply | To 1 | View Replies]

To: manic4organic

!! gotta be quick like a bunny


39 posted on 02/13/2013 12:45:31 PM PST by corkoman (Release the Palin!)
[ Post Reply | Private Reply | To 8 | View Replies]

To: Red Badger
In another revelation about the sea slug's sex life, the scientists found its penis was covered with spines

Yeesh. Talk about safe sex.

40 posted on 02/13/2013 1:10:44 PM PST by Opinionated Blowhard ("When the people find they can vote themselves money, that will herald the end of the republic.")
[ Post Reply | Private Reply | To 1 | View Replies]

To: Lurkina.n.Learnin
This internet porn thing is getting ridiculous. Sea slugs goin at it. Sheesh!

Rule 34, dude.

41 posted on 02/13/2013 1:56:45 PM PST by Slings and Arrows (You can't have IngSoc without an Emmanuel Goldstein.)
[ Post Reply | Private Reply | To 33 | View Replies]

To: Red Badger; MeekOneGOP; Conspiracy Guy; DocRock; King Prout; Darksheare; OSHA; martin_fierro; ...
Stacey Brown would understand.


42 posted on 02/13/2013 2:04:34 PM PST by Slings and Arrows (You can't have IngSoc without an Emmanuel Goldstein.)
[ Post Reply | Private Reply | To 2 | View Replies]

Comment #43 Removed by Moderator

To: Slings and Arrows

Rule 34 indeed. LOL


44 posted on 02/13/2013 2:40:27 PM PST by Lurkina.n.Learnin (Superciliousness is the essence of Obama)
[ Post Reply | Private Reply | To 41 | View Replies]

To: allmendream

This comes in handy a lot of the time. I can leave it at home when I think it’s gonna get me in trouble, or I can rent it out when I don’t need it.


45 posted on 02/13/2013 2:49:04 PM PST by ZirconEncrustedTweezers (I'll stop being a cynic when the world stops giving me reasons to be cynical.)
[ Post Reply | Private Reply | To 6 | View Replies]

To: Slings and Arrows

How come sea slugs get to use up body parts, discard them, and grow another one, and we don’t.

That would really come in handy. I could use some new arthritis-free fingers, some unscarred skin in quite a few places, and an internal organ or two.

Sigh...


46 posted on 02/13/2013 3:32:34 PM PST by TheOldLady
[ Post Reply | Private Reply | To 42 | View Replies]

To: Slings and Arrows

Actually, Rule 35 :-)


47 posted on 02/13/2013 3:45:49 PM PST by Cacique500
[ Post Reply | Private Reply | To 41 | View Replies]

To: Red Badger

Funny, I never thought of a sea slug as a “party animal” before....


48 posted on 02/13/2013 3:48:11 PM PST by Hetty_Fauxvert (FUBO, and the useful idiots you rode in on!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger

Obama will propose a penis tax on slugs. No wait the slugs are his base. Never mind.


49 posted on 02/13/2013 4:48:48 PM PST by Conspiracy Guy (I voted Republican, no Conservative was on the ballot.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger; Perdogg; martin_fierro

[Sam Kinison’s leper joke expurgated from this post]


50 posted on 02/13/2013 8:05:28 PM PST by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
[ Post Reply | Private Reply | To 1 | View Replies]


Navigation: use the links below to view more comments.
first 1-5051-53 next last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson