underwater

Showing 110 posts tagged underwater

If you’ve seen how underwater time-lapse can show the secret life of a coral reef on this site, then you already know that brilliantly fluorescing corals and sponges have fascinating, unseen experiences. But you’ve never seen “slow” marine animals like this: Slow Life by University of Queensland PhD student Daniel Stoupin.

To make this little clip I took 150000 shots. Why so many? Because macro photography involves shallow depth of field. To extend it, I used focus stacking. Each frame of the video is actually a stack that consists of 3-12 shots where in-focus areas are merged. Just the intro and last scene are regular real-time footage. One frame required about 10 minutes of processing time (raw conversion + stacking). Unfortunately, the success rate was very low due to copious technical challenges and I spent almost 9 long months just to learn how to make these kinds of videos and understand how to work with these delicate creatures.

Make sure that you watch this full-screen, HD actual size. The detail is incredible.

In the archives: more coral and time lapse.

via Kottke. Thanks, @cmykadam.

In this episode of Songs for Unusual Creatures, Michael Hearst visits the Los Angeles Zoo's Chinese Giant Salamander. This is the world’s largest salamander and the world’s largest extant amphibian, growing up to six feet long. It has a history that goes back 170 million years — that’s long before Tyrannosaurus Rex, who roamed the planet 67 to 65 million years ago, and way before the theremin and stylophone were invented.

Watch more Songs for Unusual Creatures and more videos with instruments in the archives.

And if you want your own, you’ll find the unusual Stylophone Retro Pocket Synth here.

For the last five years, Dr. Pim Bongaerts of University of Queensland’s Global Change Institute has been documenting the lives of corals through time-lapse photography. It all happens too slowly for the human eye, but capturing life in a coral reef over longer periods of time reveals much more about their growth, locomotion, and even their violent competition with each other. The video above is from BBC News: Underwater time-lapse shows secret life of a coral reef.

Plus some extra info from NOAA.gov:

So what exactly are corals?

Corals actually comprise an ancient and unique partnership, called symbiosis, that benefits both animal and plant life in the ocean. Corals are animals, though, because they do not make their own food, as plants do. Corals have tiny, tentacle-like arms that they use to capture their food from the water and sweep into their inscrutable mouths.

Any structure that we call a “coral” is, in fact, made up of hundreds to thousands of tiny coral creatures called polyps…

In the archives: more coral.

Thanks, Annie.

Updated video link.

This is a male Sapphirina copepod or Sea Sapphire, transparent and only a few millimeters long, but attention-grabbing when they seem to emit an incredible blue flash. What causes luminous color from nothing? The “microscopic layers of crystal plates inside their cells” catch light and reflect back the violet-blue. Rebecca R. Helm writes:

Like their namesake gem, different species of sea sapphire shine in different hues, from bright gold to deep blue. Africa isn’t the only place they can be found. I’ve since seen them off the coasts of Rhode Island and California. When they’re abundant near the water’s surface the sea shimmers like diamonds falling from the sky.  Japanese fisherman of old had a name for this kind of water, “tama-mizu”, jeweled water…

In the case of blue sea sapphires, these crystal layers are separated by only about four ten thousandths of a millimeter; about the same distance as a wavelength of blue light. When blue light bounces off these crystal layers, it is perfectly preserved and reflected. But for other colors of light, these small differences in distance interfere, causing the colors to cancel out. So while white light is composed of all colors, only blue light is reflected back.

More iridescence: the Blue Morpho Butterfly, Peacock Spiders, and the Birds of Paradise.

via Deep Sea News.