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Topic: underwater
What do sand dollars look like when they’re alive?
Pristine white sand dollars have long been the souvenir to commemorate a successful day at the beach. But most people who pick them up don’t realize that they’ve collected the skeleton of an animal, washed up at the e...
Planet-changing ‘invisible’ microbes on the deep sea floor
"We're making progress at a rate that's outpacing the textbooks. We can't write textbooks fast enough to cover all of the really fundamental discoveries that are happening in the field of microbial ecology right now.....
Leptocephalus, a transparent eel larva in the wild
A pale liquid in the ocean currents? Plastic pollution? An eel's ghost? An eel larva! This undulating creature is a large Leptocephalus, a not-often-seen eel in its larval stage. It was filmed by Barry Haythorne and R...
How do garden eels eat?
Alexandra Khrizman and colleagues at the Hebrew University of Jerusalem and Tel Aviv University made more than 100 dives and planted cameras among garden eels to determine how they handle currents, and whether being s...
The benefits of sea cucumber poop
There are about 1,250 different species of sea cucumber across the world's oceans. This is Thelenota anax. And yes, it's doing what you think it's doing. Sea cucumber poop is surprisingly important for the ecosystem. ...
Hydrophytes, 4D-printed aquatic ‘plants’ for the future
Tentacles wiggle. Filaments expand. Tails spiral. Looking like coral polyps, sea pens, crustaceans, and other colorful aquatic lifeforms, these multi-material 3D printed 'plants' come alive. Triggered by air that's pu...
These stunning sea slugs steal ‘weapons’ from their ingested hydroid prey
Bright blues, vibrant yellows, blazing oranges, striking reds, rich purples, electric greens, hot pinks, and some milky pastels, all in pops, spots, stripes, and bold color fields. These colors belong to around 3,000 ...
Scallops have lots of tiny eyes that act like tiny telescopes
Things you may not know about the marine bivalve molluscs called Pectinidae or scallops, as seen in the Hakai Institute video above: 1. They can swim freely for short distances to escape predators or relocate them...
Five big sharks that help keep our oceans healthy
You're probably familiar with the great white shark, but how much do you know about these other big sharks: blacktip, tiger, sand tiger, galapagos, and whale? Those are just five of roughly 500 shark species found in ...
Why Earth Has Two Levels
Earth’s outer shell is made of two materials whose different densities and thicknesses give rise to two distinct “levels” on the planet’s surface. And evidently these two materials—continental crust and more dense ...
Well Being, an animated short by Domee Shi
An unruly little kid loses a ball down a well, enlisting help from the innocent fella who was being hit with the ball just minutes before. Down into the well by bucket we go. Spot the ball floating in the cave water.....
The Cephalopod Empire in Woods Hole, Massachusetts
Bret Grasse lovingly calls the Cephalopod Operations division at the Marine Biological Laboratory (MBL) in Woods Hole, Massachusetts the “cephalopod empire.” The lab houses roughly 2,000 to 3,000 cephalopods—likely th...
Rebuilding the world’s coral reefs with coral farming
Coral are the backbone of the whole tropical ecosystem and if they disappear we’re in a lot of trouble says Ken Nedimyer, founder of the Coral Restoration Foundation. The pseudo-farmer has spent a lot of time in the w...
How deep is the ocean?
How deep is the ocean? How far down have humans traveled and what did we find when we went there? This Tech Insider animation shows us the "vast distance between the waves we see and the mysterious point we call Chall...
A swarm of hungry moon jellies
This massive swarm of moon jellies (Aurelia aurita) swims in Alaskan waters where salmon eggs will make for an easy meal. Eggs that aren't eaten will grow into salmon and will make their way into larger bodies of wate...
Repopulating an Ohio creek with giant salamanders
Eastern hellbenders live throughout the Appalachian region in the United States. Their ancestors have been on earth for around 160 million years, but in the last several decades their numbers have dropped dangerously ...
Mapping whale songs in the South Pacific
Why do male whales make such complex songs? And what are they communicating? Dr. Ellen Garland has been analyzing sound arrangements made by the tens of thousands of whales living in separate communities across the So...
Weedy sea dragons exchange eggs from female to male
Weedy sea dragons (Phyllopteryx taeniolatus) are beautiful creatures who, like their seahorse relatives, transfer care of their developing young to the father until they mature. The actual exchange of weedy sea dragon...
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