Unusual octopus likes rough sex

2015-08-13 09:51
File: AP

File: AP

Multimedia   ·   User Galleries   ·   News in Pictures Send us your pictures  ·  Send us your stories

Miami - Scientists are learning more about a mysterious octopus which taps its prey before stunning the unwitting victim into its arms, according to a study on Wednesday.

A preference for rough sex and for travelling in groups has also been noticed in the larger Pacific striped octopus, according to the research.

The animal was first discovered in Central America in the 1970s, but was so unusual scientists did not know what to make of it.

But further studies in captivity have revealed a wider picture of its behaviour for the first time.

Not only does it have a stealthy way of sneaking up on a shrimp, extending one arm to poke it, and then seizing the surprised animal in its remaining arms, it is also far more gregarious than others of the 300 known octopus species, most of which are solitary.

The larger Pacific striped octopus has been seen in groups of up to 40 off the Pacific coasts of Nicaragua and Panama, according to the study led by marine biologist Roy Caldwell, a University of California, Berkeley, professor of integrative biology.

'I've never seen anything like it'

And unlike other octopuses, which "share sperm with females at arm's length," in case the female turns aggressive, this kind cohabits with its mate for days, shares meals and "engage[s] in rough sex," according to a university statement.

"The pair grasp each other's arms sucker-to-sucker and mate beak-to-beak, as if kissing."

Most female octopuses die after laying one set of eggs, but the larger Pacific striped octopuses copulate over and over, and lay eggs over several months.

"I've never seen anything like it," said Caldwell.

"Octopuses typically pounce on their prey or poke around in holes until they find something. When this octopus sees a shrimp at a distance, it compresses itself and creeps up, extends an arm up and over the shrimp, touches it on the far side and either catches it or scares it into its other arms."

The species has no formal name, is known only as the larger Pacific striped octopus, and has yet to be officially described in the scientific literature.

The small octopuses live in water 50m deep.

Females may grow to 7cm and males make it to about 4.5cm.

The latest study is based on 24 live specimens obtained from a pet supplier and observed in laboratories at the California Academy of Sciences and UC Berkeley.

Read more on:    us  |  research  |  marine life

Join the conversation!

24.com encourages commentary submitted via MyNews24. Contributions of 200 words or more will be considered for publication.

We reserve editorial discretion to decide what will be published.
Read our comments policy for guidelines on contributions.

24.com publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.

Comment on this story
Comments have been closed for this article.

Inside News24

Traffic Alerts
There are new stories on the homepage. Click here to see them.


Create Profile

Creating your profile will enable you to submit photos and stories to get published on News24.

Please provide a username for your profile page:

This username must be unique, cannot be edited and will be used in the URL to your profile page across the entire 24.com network.


Location Settings

News24 allows you to edit the display of certain components based on a location. If you wish to personalise the page based on your preferences, please select a location for each component and click "Submit" in order for the changes to take affect.

Facebook Sign-In

Hi News addict,

Join the News24 Community to be involved in breaking the news.

Log in with Facebook to comment and personalise news, weather and listings.