Study finds mantis shrimp process vision differently than other organisms (w/ video) (Phys.org) —Researchers with the University of Queensland, Brisbane along with an associate from National Cheng Kung University, in China have found what they believe to be a reasonable explanation for mantis shrimp having 12 photoreceptors in their eyes. 
In their paper published in the journal Science, the team describes a study they conducted where shrimp were trained to respond to different colors, which led to the discovery that despite more receptors than most other organisms, they are less able to discriminate between different colors—a finding that indicates they process colors in a different way. Michael Land and Daniel Osorio offer a Perspective piece on the researchers efforts in the same journal issue.
Scientists have known for many years that mantis shrimp have more photoreceptors than most other organisms, but have not, until now, been able to come up with a reason why. The assumption had been that the creatures had some special vision abilities that allowed them to see things that others could not. In this new effort, it appears that the large numbers of receptors adds a speed advantage rather than visual enhancement…
(read more)Image: Roy L. Caldwell

Study finds mantis shrimp process vision differently than other organisms (w/ video)

(Phys.org) —Researchers with the University of Queensland, Brisbane along with an associate from National Cheng Kung University, in China have found what they believe to be a reasonable explanation for mantis shrimp having 12 photoreceptors in their eyes.

In their paper published in the journal Science, the team describes a study they conducted where shrimp were trained to respond to different colors, which led to the discovery that despite more receptors than most other organisms, they are less able to discriminate between different colors—a finding that indicates they process colors in a different way. Michael Land and Daniel Osorio offer a Perspective piece on the researchers efforts in the same journal issue.

Scientists have known for many years that mantis shrimp have more photoreceptors than most other organisms, but have not, until now, been able to come up with a reason why. The assumption had been that the creatures had some special vision abilities that allowed them to see things that others could not. In this new effort, it appears that the large numbers of receptors adds a speed advantage rather than visual enhancement…

(read more)

Image: Roy L. Caldwell

Mantis Shrimp:
Just saw your post and I figured I would share this picture with you! My crew and I got these when we were sampling with the SUNY Stony Brook Trawl in the Long Island sound! :3
Paxon:
Oh awesome, wow. He’s beautiful! This looks like my old friend Squilla empusa.
http://www.ucmp.berkeley.edu/arthropoda/crustacea/malacostraca/eumalacostraca/royslist/species.php?name=s_empusa

Mantis Shrimp:

Just saw your post and I figured I would share this picture with you! My crew and I got these when we were sampling with the SUNY Stony Brook Trawl in the Long Island sound! :3

Paxon:

Oh awesome, wow. He’s beautiful! This looks like my old friend Squilla empusa.

http://www.ucmp.berkeley.edu/arthropoda/crustacea/malacostraca/eumalacostraca/royslist/species.php?name=s_empusa

mucholderthen

mucholderthen:

BEAUTIFUL SHRIMP (continued from my previous post of Guerra illustrations)

[1] Dark mantis shrimpNeogonodactylus curacaoensis 

[2] Rock mantis shrimp – Neogonodactylus oerstedii 

[3] Caribbean Striped Mantis ShrimpLysiosquillina glabriuscula

[4] Ghost shrimp – Neocallichirus cacahuate

[5] Spotted cleaner shrimp – Periclimenes yucatanicus

Taxonomic Illustrations of Shrimp
by Alberto Guerra  [ albertoguerra ] - Yucatan (Mexico)
Digital art created with Photoshop CS6 & Wacom tablet
© BDMY - Biodiversidad Marina de Yucatán / UNAM Sisal

Absurd Creature of the Week:

Ferocious, Fearless Mantis Shrimp Is the Honey Badger of the Sea

by Matt Simon

These are the stomatopods, some 550 known species of mantis shrimp that range from less than an inch long to well over a foot. They’re feisty, beautifully complex creatures that strike so quickly that they momentarily superheat the water around their spring-loaded clubs to a temperature nearly as hot as the surface of the sun.

They may not be particularly big, but they will fight just about anything that so much as looks at them funny. Octopuses, humans, each other — you name it. You see, the mantis shrimp doesn’t grab ass. It kicks it.

Mantis shrimp are split into two groups. Smashers methodically dismember and knock their prey unconscious. Spearers impale fish with spikey appendages, much like their insect namesake. The speed and power with which these creatures strike simply defies logic. While the spearers can lash at their prey in a mere 20 to 30 milliseconds, the smashers can be 10 times as quick. This is the fastest predatory strike on the planet…

(read more: Wired Science)

amazing motherfucking photos by Roy Caldwell

montereybayaquarium
montereybayaquarium:

Peacock Mantis Shrimp — He’s Baaaaack!
Tiny, deadly and gorgeous. That’s the peacock mantis shrimp, and we just placed one on exhibit in our Splash Zone galleries.
You’ll have to work a bit to see it. It’s housed — alone — in a small aquarium inside the Coral Crawl tunnel in Splash Zone. But it’s well worth the effort!
This is the first time we’ve hosted a  mantis shrimp since 2001 when one of them stowed away inside some coral rock and earned us international headlines and live CNN coverage. (There’s something compelling about a “killer shrimp” terrorizing other animals in the children’s area of an internationally known aquarium.)
They pack quite a punch
Since then, we’ve been wary of deliberately introducing a mantis shrimp — and for good reason. Aquarists and scuba divers refer to them as “thumb-splitters” because their claws pack a punch as powerful as a .22-caliber bullet.
Those same claws can shatter a clam shell, and crack open a crab or shatter glass. They can bring down a blue-ringed octopus or a fish. The claws are made of a material so hard it can deliver 50,000 blows between molts - without breaking. It’s being studied by scientists as a model for crafting super-strong body armor for soldiers.
And it moves its claws so fast that they turn water into plasma and sound into light.
Amazing!
“A thermonuclear bomb of light and beauty”
But that’s not the end of the story, as celebrated cartoonist Matthew Inman of The Oatmeal explains in his online love-letter, “Why the mantis shrimp is my new favorite animal.”
He starts by examining the eyes that make them unbelievably effective hunters. Their vision is so sensitive that a mantis shrimp can see in both infrared and ultraviolet spectra, and uses 16 color receptor cones (compared to just three for humans).
Inman observes: “Where we see a rainbow, the mantis shrimp sees a thermonuclear bomb of light and beauty.”
It’s that combination of experiencing a world of transcendent beauty — and then turning around and pounding its prey to smithereens — that fascinates Matthew Inman.
We hope you’ll be fascinated, too, at the chance to see a peacock mantis shrimp face to face — on the other side of shatterproof acrylic.

montereybayaquarium:

Peacock Mantis Shrimp — He’s Baaaaack!

Tiny, deadly and gorgeous. That’s the peacock mantis shrimp, and we just placed one on exhibit in our Splash Zone galleries.

You’ll have to work a bit to see it. It’s housed — alone — in a small aquarium inside the Coral Crawl tunnel in Splash Zone. But it’s well worth the effort!

This is the first time we’ve hosted a  mantis shrimp since 2001 when one of them stowed away inside some coral rock and earned us international headlines and live CNN coverage. (There’s something compelling about a “killer shrimp” terrorizing other animals in the children’s area of an internationally known aquarium.)

They pack quite a punch

Since then, we’ve been wary of deliberately introducing a mantis shrimp — and for good reason. Aquarists and scuba divers refer to them as “thumb-splitters” because their claws pack a punch as powerful as a .22-caliber bullet.

Those same claws can shatter a clam shell, and crack open a crab or shatter glass. They can bring down a blue-ringed octopus or a fish. The claws are made of a material so hard it can deliver 50,000 blows between molts - without breaking. It’s being studied by scientists as a model for crafting super-strong body armor for soldiers.

And it moves its claws so fast that they turn water into plasma and sound into light.

Amazing!

“A thermonuclear bomb of light and beauty”

But that’s not the end of the story, as celebrated cartoonist Matthew Inman of The Oatmeal explains in his online love-letter, “Why the mantis shrimp is my new favorite animal.”

He starts by examining the eyes that make them unbelievably effective hunters. Their vision is so sensitive that a mantis shrimp can see in both infrared and ultraviolet spectra, and uses 16 color receptor cones (compared to just three for humans).

Inman observes: “Where we see a rainbow, the mantis shrimp sees a thermonuclear bomb of light and beauty.”

It’s that combination of experiencing a world of transcendent beauty — and then turning around and pounding its prey to smithereens  that fascinates Matthew Inman.

We hope you’ll be fascinated, too, at the chance to see a peacock mantis shrimp face to face — on the other side of shatterproof acrylic.

How ‘Smashing’ & ‘Spearing’ Shrimp Speedily Attack Prey 
by Douglas Main
Spearing mantis shrimp hide in their burrows and wait for an unsuspecting creature to come along. Then, in the blink of an eye, they spear it with their long claws, like an underwater archer. How do they spear their prey so quickly?
Maya deVries, a researcher at the University of California, Berkeley, compared the attack of the spearing shrimp with its relative, the “smasher” shrimp. Both animals are able to unleash quick attacks with a strange spring and latch system that stores up energy in their muscles and releases it in an instant. It’s like a bow and arrow, she said.
Unexpectedly, she found that smasher mantis shrimp can move much more quickly than the spearing variety, which is the opposite of what was expected. The smashers, she found, need quick speeds to produce enough force to crack the shells of their prey, such as crabs and other shellfish. The spearing shrimp, on the other hand, only needs to move slightly faster than their prey, she said…
(read more: LiveScience)                        (photo: Roy Caldwell/UC Berkeley)

How ‘Smashing’ & ‘Spearing’ Shrimp Speedily Attack Prey

by Douglas Main

Spearing mantis shrimp hide in their burrows and wait for an unsuspecting creature to come along. Then, in the blink of an eye, they spear it with their long claws, like an underwater archer. How do they spear their prey so quickly?

Maya deVries, a researcher at the University of California, Berkeley, compared the attack of the spearing shrimp with its relative, the “smasher” shrimp. Both animals are able to unleash quick attacks with a strange spring and latch system that stores up energy in their muscles and releases it in an instant. It’s like a bow and arrow, she said.

Unexpectedly, she found that smasher mantis shrimp can move much more quickly than the spearing variety, which is the opposite of what was expected. The smashers, she found, need quick speeds to produce enough force to crack the shells of their prey, such as crabs and other shellfish. The spearing shrimp, on the other hand, only needs to move slightly faster than their prey, she said…

(read more: LiveScience)                        (photo: Roy Caldwell/UC Berkeley)

ichthyologist

ichthyologist:

World’s fastest punch vaporizes water

The Peacock mantis shrimp (Odontodactylus scyllarus) is capable of firing its clubbed claws at over 80 km/h (50 mph), with an acceleration similar to a .22 caliber bullet. The shrimp uses its club both for defense and offense, and can generate 90 kg (200 pounds) of force. The strike is so fast, it boils surrounding water, creating cavitation bubbles that immediately collapse under water pressure, striking the prey a second time. The collapsing bubble also creates a short lived flash of light and temperatures of several thousand kelvin.

Gifs are made from this BBC YouTube video:

Fastest animals on Earth in slow motion - Animal Camera - BBC

Credit goes to BBC

Secret of Hard Hitting Crustacean Claws Found

by Stephanie Pappas

If sea creatures were Marvel comic book characters, the peacock mantis shrimp would be Thor. These colorful crustaceans have a hammerlike claw that can smash prey with the acceleration of a 0.22-caliber bullet — not unlike the superhero’s mythological weapon.

Now, a new study reveals the secrets behind the strength of the mantis shrimp's claw at the molecular level. It turns out this appendage is ideally adapted to deliver punishing blow after punishing blow without breaking. These adaptations are already inspiring researchers to engineer biology-mimicking materials that could inspire everything from better boat propellers to safer body armor.

"What makes [mantis shrimp claws] so incredible is that they’re stiff and they’re also tough, which is really kind of an inverse relationship in materials science," said study researcher David Kisailus, a materials scientist at the University of California, Riverside…

(read more: Live Science)      

(photos: Michael Bok; T - Gonodactylus chiragra, B - G. platysoma)

shedsumlight
shedsumlight:Peacock Mantis Shrimp

Image: oceanleadership.org
Mantis shrimp or stomatopods are marine crustaceans, the members of the order Stomatopoda. They are neither shrimp nor mantids, but receive their name purely from the physical resemblance to both the terrestrial praying mantis and the shrimp. They may reach 30 centimetres (12 in) in length, although exceptional cases of up to 38 cm (15 in) have been recorded. 
Mantis shrimp appear in a variety of colours, from shades of browns to bright neon colours. Although they are common animals and among the most important predators in many shallow, tropical and sub-tropical marine habitats, they are poorly understood as many species spend most of their life tucked away in burrows and holes.
These aggressive and typically solitary sea creatures spend most of their time hiding in rock formations or burrowing intricate passageways in the sea bed. They either wait for prey to chance upon them or, unlike most crustaceans, actually hunt, chase and kill prey. They rarely exit their homes except to feed and relocate, and can be diurnal, nocturnal or crepuscular, depending on the species. Most species live in tropical and subtropical seas (Indian and Pacific Oceans between eastern Africa and Hawaii), although some live in temperate seas.

shedsumlight:Peacock Mantis Shrimp

Image: oceanleadership.org

Mantis shrimp or stomatopods are marine crustaceans, the members of the order Stomatopoda. They are neither shrimp nor mantids, but receive their name purely from the physical resemblance to both the terrestrial praying mantis and the shrimp. They may reach 30 centimetres (12 in) in length, although exceptional cases of up to 38 cm (15 in) have been recorded. 

Mantis shrimp appear in a variety of colours, from shades of browns to bright neon colours. Although they are common animals and among the most important predators in many shallow, tropical and sub-tropical marine habitats, they are poorly understood as many species spend most of their life tucked away in burrows and holes.

These aggressive and typically solitary sea creatures spend most of their time hiding in rock formations or burrowing intricate passageways in the sea bed. They either wait for prey to chance upon them or, unlike most crustaceans, actually hunt, chase and kill prey. They rarely exit their homes except to feed and relocate, and can be diurnalnocturnal or crepuscular, depending on the species. Most species live in tropical and subtropical seas (Indian and Pacific Oceans between eastern Africa and Hawaii), although some live in temperate seas.

blackkittenclan
blackkittenclan: illustration of Lysiosquilla maculata, by Alcide d’Orbigny
* The Striped Mantis Shrimp, is found across the Indo-Pacific region from East Africa to the Galápagos and Hawaiian Islands.At a length of up to 40 cm, L. maculata is the largest mantis shrimp in the world.L. maculata may be distinguished from its congener L. sulcata by the greater number of teeth on the last segment of its raptorial claw, and by the colouration of the uropodal endopod, the distal half of which is dark in L. maculata but not in L. sulcata.There is a small artisanal fishery for this species. 
(via: Wikipedia)

blackkittenclan: illustration of Lysiosquilla maculata, by Alcide d’Orbigny

* The Striped Mantis Shrimp, is found across the Indo-Pacific region from East Africa to the Galápagos and Hawaiian Islands.At a length of up to 40 cm, L. maculata is the largest mantis shrimp in the world.L. maculata may be distinguished from its congener L. sulcata by the greater number of teeth on the last segment of its raptorial claw, and by the colouration of the uropodal endopod, the distal half of which is dark in L. maculata but not in L. sulcata.There is a small artisanal fishery for this species.

(via: Wikipedia)