Got Milk? How?
Flush-Free Fertilizer
Silk’s superpowers
Frogs and Toads
Ant Invasions Change the Rules
How to Fly Like a Bat
A Butterfly's New Green Glow
The (kids') eyes have it
A Light Delay
Taking a Spill for Science
Chemistry and Materials
Boosting Fuel Cells
Scientist Profile: Wally Gilbert
Makeup Science
New eyes to scan the skies
Play for Science
Hitting the redo button on evolution
Dinosaurs and Fossils
Feathered Fossils
A Really Big (but Extinct) Rodent
Mammals in the Shadow of Dinosaurs
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Unnatural Disasters
A Grim Future for Some Killer Whales
Ancient Heights
To Catch a Dragonfly
Lessons from a Lonely Tortoise
The Wolf and the Cow
Finding the Past
Writing on eggshells
Chicken of the Sea
Ancient Cave Behavior
White Tip Sharks
Bull Sharks
Food and Nutrition
Yummy bugs
Moving Good Fats from Fish to Mice
Chocolate Rules
GSAT English Rules
Whoever vs. Whomever
Who vs. Whom
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
GSAT Scholarship
Ministry of Education Announces 82 GSAT Scholarships for 2010
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
2014 GSAT Results for Jamaican Kids
GSAT Scholarship
GSAT Mathematics
Monkeys Count
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Secrets of an Ancient Computer
Human Body
Prime Time for Broken Bones
A Sour Taste in Your Mouth
Heart Revival
African Hyenas
Miscellaneous Mammals
Choosing a Preschool: What to Consider
Raise a Lifelong Reader by Reading Aloud
What Not to Say to Emerging Readers
Gaining a Swift Lift
Thinner Air, Less Splatter
Powering Ball Lightning
Fastest Plant on Earth
Nature's Alphabet
City Trees Beat Country Trees
Sea Turtles
Snapping Turtles
Space and Astronomy
Super Star Cluster in the Neighborhood
Pluto's New Moons
Planet Hunters Nab Three More
Technology and Engineering
A Satellite of Your Own
Morphing a Wing to Save Fuel
Musclebots Take Some Steps
The Parts of Speech
What is a Preposition?
Problems with Prepositions
What is a Verb?
Ready, unplug, drive
Where rivers run uphill
How to Fly Like a Bat
Weekend Weather Really Is Different
A Change in Climate
Where rivers run uphill
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The term crab is often applied to several different groups of short (nose to tail) crustaceans with thick exoskeletons, but only members of the Brachyura are true crabs. Others, such as hermit crabs, porcelain crabs and king crabs are, despite superficial similarities, not crabs at all; they can be distinguished from true crabs by counting the legs (Uninjured true crabs always have five visible pairs of legs.) True crabs have five pairs of walking legs (the first of which is modified into a pair of claws) and typically a flattened shell. In all but a few crabs, the abdomen is folded under the cephalothorax. The form of the abdomen usually reveals the sex of the crab; males have a narrow abdomen, while females have a much wider abdomen, under which they carry their eggs. Crabs are a very diverse group, mostly found in saltwater, but with some groups living in freshwater or on land. Although famed for their tendency to walk sideways, crabs are in fact able to walk in any direction. Twenty percent: Crabs make up 20% of all marine crustaceans caught and farmed worldwide, with over 1˝ million tonnes being consumed annually. Of that total, one species accounts for one fifth: Portunus trituberculatus. Other important taxa include Portunus pelagicus, several species in the genus Chionoecetes, Callinectes sapidus, Charybdis spp., Cancer pagurus, Cancer magister and Scylla serrata, each of which provides more than 20,000 tonnes annually.


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