Agriculture
Earth-Friendly Fabrics
Making the most of a meal
Chicken Eggs as Drug Factories
Amphibians
Salamanders and Newts
Salamanders
Newts
Animals
Sleepless at Sea
Young Ants in the Kitchen
Jay Watch
Behavior
Wake Up, Sleepy Gene
A brain-boosting video game
Island of Hope
Birds
Kiwis
Rheas
Swifts
Chemistry and Materials
A Spider's Silky Strength
Salt secrets
Popping to Perfection
Computers
The Book of Life
Graphene's superstrength
The Earth-bound asteroid scientists saw coming
Dinosaurs and Fossils
Tiny Pterodactyl
A Dino King's Ancestor
Dino Babies
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Undersea Vent System Active for Ages
Meteorites may have sparked life on Earth
Earth's Poles in Peril
Environment
Swimming with Sharks and Stingrays
The Wolf and the Cow
Improving the Camel
Finding the Past
Ancient Cave Behavior
A Long Haul
Unearthing Ancient Astronomy
Fish
Sharks
A Grim Future for Some Killer Whales
Electric Ray
Food and Nutrition
Healing Honey
The Color of Health
A Taste for Cheese
GSAT English Rules
Problems with Prepositions
Subject and Verb Agreement
Adjectives and Adverbs
GSAT Exam Preparation Jamaica
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT Scholarship
GSAT stars reap scholarship glory
GSAT Exams Jamaica Scholarships
GSAT stars reap scholarship glory
GSAT Exam Preparation
GSAT Scholarship
GSAT Mathematics
Math of the World
Math and our number sense: PassGSAT.com
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Human Body
Smiles Turn Away Colds
Surviving Olympic Heat
Disease Detectives
Invertebrates
Shrimps
Crustaceans
Praying Mantis
Mammals
Moose
Sea Lions
Rottweilers
Parents
How children learn
The Surprising Meaning and Benefits of Nursery Rhymes
Expert report highlights the importance to parents of reading to children!
Physics
Powering Ball Lightning
One ring around them all
Gaining a Swift Lift
Plants
White fuzzy mold not as friendly as it looks
Stalking Plants by Scent
Fast-flying fungal spores
Reptiles
Garter Snakes
Lizards
Rattlesnakes
Space and Astronomy
Zooming In on the Wild Sun
A Dead Star's Dusty Ring
Ready, Set, Supernova
Technology and Engineering
Weaving with Light
Beyond Bar Codes
Supersuits for Superheroes
The Parts of Speech
Pronouns
What is a Verb?
Problems with Prepositions
Transportation
Where rivers run uphill
Are Propellers Fin-ished?
Robots on a Rocky Road
Weather
Earth's Poles in Peril
Polar Ice Feels the Heat
A Change in Climate
Add your Article

Nurse Sharks

Nurse sharks are cosmopolitan carpet sharks belonging to the family Ginglymostomatidae. Common in shallow, tropical and subtropical waters of the western Atlantic and eastern Pacific, the family comprises three genera each with one species. They are benthic sharks, characterised as being sluggish and docile. Nurse sharks typically attack humans only if directly threatened. Weights and Measures: The largest species, called simply the nurse shark (Ginglymostoma cirratum), may reach a length of 4.3 metres; the tawny nurse shark (Nebrius ferrugineus) is somewhat smaller at 3.2 metres, and the short-tailed nurse shark (Pseudoginglymostoma brevicaudatum) is by far the smallest at just 75 centimetres in length. The first of the three species may reach a weight of 110 kilograms. Muscular Pecs: Yellowish to dark brown in colour, nurse sharks have muscular pectoral fins, two spineless dorsal fins (the second of which is smaller) in line with the pelvic and anal fins, and a tail exceeding one quarter the shark's body length. Fleshy Barbels: The mouths of nurse sharks are most distinctive; it is far ahead of the eyes and before the snout (sub-terminal), an indication of the bottom-dwelling (benthic) nature of these sharks. Also present on the lower jaw are two fleshy barbels, chemosensory organs which help the nurse sharks to find prey hidden in the sediments. Behind each eye is a very small circular opening called a spiracle, part of the shark's respiratory system. The serrated teeth are fan-shaped and independent; like other sharks, the teeth are continually replaced throughout the animal's life. Night Nurse: Nurse sharks are nocturnal animals, spending the day in large inactive groups of up to 40 individuals. Hidden under submerged ledges or in crevices within the reef, the nurse sharks seem to prefer specific haunts and will return to them every day. By night, the sharks are largely solitary; they spend most of their time rifling through the bottom sediments in search of food. Their diet consists primarily of crustaceans, molluscs, tunicates, and other fish, particularly stingrays. On the Menu: Nurse sharks are thought to take advantage of dormant fish which would otherwise be too fast for the sharks to catch; although their small mouths limit the size of prey items, the sharks have large throat cavities which are used as a sort of bellows valve. In this way nurse sharks are able to suck in their prey like a vacuum. Nurse sharks are also known to graze algae and coral. Birds and Bees: The mating season runs from late June to the end of July. Nurse sharks are ovoviviparous, meaning the eggs develop and hatch within the body of the female, where the hatchlings develop further until live birth occurs. The gestation period is six months, with a typical brood of 30-40 pups. The mating cycle is biennial, as it takes 18 months for the female's ovaries to produce another batch of eggs. The young nurse sharks are born fully developed at about 30 centimetres long in Ginglymostoma cirratum. They possess a spotted coloration which fades with age.

Nurse Sharks
Nurse Sharks








Designed and Powered by HBJamaica.com™