+33 490 162 042 Call us
Facebook About us Français

Image number: 2417574

Tara Oceans Expeditions - May 2011. Salp aggregation containing small shrimps (symbiosis?). A salp (plural salps) or salpa (plural salpae or salpas) is a barrel-shaped, planktonic tunicate. It moves by contracting, thus pumping water through its gelatinous body. The salp strains the pumped water through its internal feeding filters, feeding on phytoplankton. Salps are common in equatorial, temperate, and cold seas, where they can be seen at the surface, singly or in long, stringy colonies. The most abundant concentrations of salps are in the Southern Ocean (near Antarctica). Here they sometimes form enormous swarms, often in deep water, and are sometimes even more abundant than krill. Over the last century, while krill populations in the Southern Ocean have declined, salp populations appear to be increasing. The chain of salps is the aggregate portion of the life cycle. The aggregate individuals are also known as blastozooids; they remain attached together while swimming and feeding, and each individual grows in size. Each blastozooid in the chain reproduces sexually (the blastozooids are sequential hermaphrodites, first maturing as females, and are fertilized by male gametes produced by older chains), with a growing embryo oozoid attached to the body wall of the parent. The growing oozoids are eventually released from the parent blastozooids, then they continue to feed and grow as the solitary asexual phase, thus closing the life cycle of salps.

© Christoph Gerigk / Biosphoto

View author's portfolio

Rights Managed

JPEG bitmap image

Image size: 3081x2054 pixels (10.3"x6.8" @300dpi)

Shooting date : 2011-05-04

LightboxDownload low resolution imageDownload hi-resolution image


Wild animal / Tunicate / Salp / Thalia

Wild animal / Crustacean / Decapod / Shrimp

Area / Marine area / Sea / Tropical sea

Individual / Nobody

Shot / Black background


World sea and ocean / Pacific Ocean

America / South America / Ecuador / Galápagos Islands

Species / Species particularity / Aquatic species / Pelagos / Plankton

Shot / Underwater shot

Shot / Overview

Species / Relation between species / Symbiosis


Enumeration / Alone

Enumeration / Group / Multitude / Colony

Science / Scientific research

Environment / Environment awareness / Nature conservancy organization / Tara expedition / Tara Oceans (Expedition)

Latin keywords

Eukaryota / Opisthokonta / Metazoa / Bilateria / Coelomata / Deuterostomia / Chordata / Urochordata / Thaliacea

Your request is processing. Please wait...

Galleries General conditions Legal notices Photographers area

Your request has been registered.

To use this feature you must first register or login.

Log in

To organize photos in lightboxes you must first register or login. Registration is FREE! Lightboxes allow you to categorize your photos, to keep them when you sign in and send them by email.

Log in

A Biosphoto authorization has to be granted prior using this feature. We'll get in touch shortly, please check that your contact info is up to date. Feel free to contact us in case of no answer during office hours (Paris time).

Delete permanently this lightbox?

Delete permanently all items?

The lightbox has been duplicated

The lightbox has been copied in your personal account

Your request has been registered. You will receive an e-mail shortly in order to download your images.

You can insert a comment that will appear within your downloads reports.

Your album has been sent.

In case of modification, changes will be seen by your recipient.

If deleted, your album won't be avalaible for your recipient anymore.