The Echinoblog: filter feeding

Showing posts with label filter feeding. Show all posts

Tuesday, July 22, 2014

Deep-Sea Poop, Amoebas, Basket Stars, Pinwheel Crinoids and MORE! Pics from the NOAA Deep-sea Photo Archive!

Gulf of Alaska 2004 Expedition. NOAA Office of Ocean Exploration

This week I have been researching images from deep-sea video on the home page for the NOAA Photo Library, which has housed ALL of the deep-sea and other imagery from NOAA's deep-sea expeditions since 2003, including those of the Okeanos Explorer!

Many of you know that I have participated in the last two R/V Okeanos ROV dives as an onshore advisor. I often identify asteroids (i.e. starfish) and provide other information as I am able. I've only helped them out since 2013 but found lots of their images useful for my research.

You can find NOAA-Okeanos dive screengrab recaps on my blog here for 2013 and here for the recent 2014 dive.

Those of you on my Twitter account (@echinoblog) have been watching me post links to various pictures as I have been reviewing these pics.. There are literally THOUSANDS of pictures of deep-sea biology, geology and history !!! Who would be crazy enough to go through all of it one by one??? Yes. Me!

So, for your education and infotainment I have cherry picked many noteworthy images and have showcased them below. (note that ALL images have original links below them)! Enjoy!

Giant Amoeba Houses??
Here's a cool structure made by a giant amoeba called a xenophyophorean! (deep-sea Galapagos) Take a moment to consider that a UNICELLULAR organism could have made this! (and yes, they will eat proper animals!)

From the 2011 NOAA Okeanos Explorer Program, Galapagos Rift Expedition 2011

But in contrast, what about this from Indonesia??? A Mystery?? Another xenophyophorean??

From July 2010 NOAA Okeanos Explorer Program, INDEX-SATAL 2010

Basket Stars Behaving uh... badly?

What is going on here? I've honestly never seen TWO basket stars so close to one another. What are they doing? Fighting? Doin teh sex? The gorgonocephalid equivalent of a backrub? Only they know for sure. (North Atlantic)

From Lophelia II 2008: Deepwater Coral Expedition: Reefs, Rigs, and Wrecks

Brittle Stars Doing Crazy Things!

From the Atlantic... Probably just filter feeding, but I don't know that I've ever seen so many of them with their arms all curled up like that just FLAT on the sediment. Weird.

From the Lophelia II 2008: Deepwater Coral Expedition: Reefs, Rigs, and Wrecks

and more of the same...

from Lophelia II 2008: Deepwater Coral Expedition: Reefs, Rigs, and Wrecks

Here is what we call in science "a fancy pants brittle star" (note the gorgeous red and white pattern though) on a really extended whip coral (aka antipatharian). Video from the Bahamas in 2009.

From Bioluminescence 2009 Expedition, NOAA/OER

And still MORE!

From 2009 Bioluminescence 2009 Expedition, NOAA/OER

PIN WHEEL CRINOID??

A cool looking "pin wheel" stalked crinoid (Hyocrinidae) from Indonesia, a new species currently being worked on by colleagues in Paris. This is what it looks like "open"

From NOAA Okeanos Explorer Program, INDEX-SATAL 2010

and curiously, this species retracts its arm in repose like this! As the kids say these days "That is pretty whack! "

From NOAA Okeanos Explorer Program, INDEX-SATAL 2010

BIG PACKS OF FILTER FEEDING ECHINODERMS!

Stalked isocrinid crinoids! From the Marianas Arc, Pacific Ocean! All turned into the current!!

Image courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program

Also from the Marianas Arc, Pacific Ocean: A crazy huge field of basket stars (Gorgonocephalidae)..

Image from the Submarine Ring of Fire 2006 Exploration, NOAA Vents Program

Some translucent Swimming Sea Cucumber intestine showing POOP??

from NOAA Okeanos Explorer Program, Mid-Cayman Rise Expedition 2011

Is this Sea Cucumber Poop??
Exotic Indonesian Sea cucumber poop? Or possibly from an Acorn Worm? (below)

From NOAA Okeanos Explorer Program, INDEX-SATAL 2010

Deep-Sea Urchin POOP!

Here is a great shot of an Echinothuriid urchin (aka the pancake or tam o shanter urchin) taking a poop!! A Gulf of Mexico species. Contrary to what the labels on the website say, this is defecation and NOT gametes being released.

NOAA Okeanos Explorer Program, Gulf of Mexico 2012 Expedition

Deep-sea Urchin Poop!

NOAA Okeanos Explorer Program, Gulf of Mexico 2012 Expedition

and a special non-echinoderm poop bonus! Acorn Worm POOP!
Images from Indonesia.. Worms leaving unique castings in the sediment...

From NOAA Okeanos Explorer Program, INDEX-SATAL 2010

What I hope is that this will provide a spotlight on NOAA's very EXTENSIVE library of images!

MANY valuable and interesting things in there! Enough for many more posts. But what's most amazing? A lot of it is UNPUBLISHED stuff!!

But its hard to make a guess as to what kinds of things you will find (sometimes because you don't know what you are looking for) This provides a taste of the diversity and abundance of tantalizing images. Sponges! Corals! Worms! Even protists!

Tuesday, August 28, 2012

Crinoid Close ups!

Crinoids, aka Feather stars are probably the least familiar of echinoderms to many people. They've been around for awhile and you can often see their older Paleozoic ancestors with stalks in fossil beds throughout the world.

But most modern crinoids almost resemble plants (albeit stunning ones). The picture above shows a typical "feather star" or comatulid crinoid. The arms have feathery appendages called pinnules which are used for capturing food.

To give you some reference.. here's a generalized diagram. Food goes into the mouth located on the "inside" of the cup where the arms meet.

Image from lander.edu

I've often tried to make several echinoderms more "visible" to people by sharing some incredible imagery of them-from perspectives that might be unfamiliar. Some of my posts on ophiuroids here and here for example...

Here is a very busy picture of the many structures surrounding the MOUTH (at center covered by more tentacles) (critter from Fiji) (image by Jaw'sDad-Jeff Williams):

Here's a great picture of the UNDERSIDE of a feather star. See those tentacle-like things wrapped around the whip coral? Those are called "cirri". Those are the "feet" that adhere the remainder of the animal to its perch. This image by "sabahsharky"

Blue Crinoid Close up.. from Sulawesi, Indonesia. These are the feeding arms with yellow tipped extensions called pinnules. Image by Richard Merritt, FRPS.