Agriculture
Keeping Bugs Away from Food
Growing Healthier Tomato Plants
New Gene Fights Potato Blight
Amphibians
Salamanders
Toads
Bullfrogs
Animals
Staying Away from Sick Lobsters
Glimpses of a Legendary Woodpecker
Professor Ant
Behavior
Listen and Learn
Contemplating thought
Pipefish power from mom
Birds
Woodpecker
Emus
Rheas
Chemistry and Materials
These gems make their own way
Cooking Up Superhard Diamonds
A Butterfly's Electric Glow
Computers
Getting in Touch with Touch
The Book of Life
The Shape of the Internet
Dinosaurs and Fossils
Downsized Dinosaurs
Tiny Pterodactyl
A Really Big (but Extinct) Rodent
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
Earth
Earth's Poles in Peril
Easy Ways to Conserve Water
Snowflakes and Avalanches
Environment
Giant snakes invading North America
Power of the Wind
The Oily Gulf
Finding the Past
A Long Trek to Asia
Ancient Cave Behavior
Stonehenge Settlement
Fish
Piranha
Flashlight Fishes
Skates and Rays
Food and Nutrition
The Color of Health
Sponges' secret weapon
Packing Fat
GSAT English Rules
Pronouns
Problems with Prepositions
Finding Subjects and Verbs
GSAT Exam Preparation Jamaica
GSAT stars reap scholarship glory
Ministry of Education Announces 82 GSAT Scholarships for 2010
GSAT Exam Preparation
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
Results of GSAT are in schools this week
GSAT stars reap scholarship glory
GSAT Mathematics
Math Naturals
GSAT Practice Papers | GSAT Mathematics | Maths
How to Slice a Cake Fairly
Human Body
A Sour Taste in Your Mouth
The tell-tale bacteria
Dreaming makes perfect
Invertebrates
Giant Clam
Centipedes
Mussels
Mammals
Quokkas
Mule
Cornish Rex
Parents
The Surprising Meaning and Benefits of Nursery Rhymes
Expert report highlights the importance to parents of reading to children!
Choosing a Preschool: What to Consider
Physics
Thinner Air, Less Splatter
One ring around them all
Spin, Splat, and Scramble
Plants
Springing forward
When Fungi and Algae Marry
City Trees Beat Country Trees
Reptiles
Alligators
Crocodilians
Reptiles
Space and Astronomy
A Moon's Icy Spray
Baby Star
Holes in Martian moon mystery
Technology and Engineering
Switchable Lenses Improve Vision
Musclebots Take Some Steps
Squeezing Oil from Old Wells
The Parts of Speech
Adjectives and Adverbs
What is a Noun
Pronouns
Transportation
Tinkering With the Basic Bike
Robots on the Road, Again
Robots on a Rocky Road
Weather
Warmest Year on Record
Catching Some Rays
A Change in Climate
Add your Article

Piranha

The piranhas or piraņas are a group of carnivorous freshwater fish living in South American rivers. They belong to five genera of the subfamily of Serrasalminae (which also includes closely related herbivorous fish including pacus and silver dollars). They are normally about 15 to 25 cm long (6 to 10 inches), although reportedly individuals have been found up to 40 cm in length. They are known for their sharp teeth (able to bite through a steel fishing hook) and an aggressive appetite for meat and flesh. They are normally only found in the Amazonian, Guianas and Paraguayan river systems. However, piranha (most likely former aquarium-dwellers) are also occasionally found in the Potomac River, but they typically do not survive the cold winters of that region Recent research on Serrasalmus aff. brandtii and Pygocentrus nattereri in Viana Lake, which is formed during the wet season when the Rio Pindare (a left bank tributary of the Rio Mearim) floods, has shown that these species eat vegetable matter at some stages in their life history. They are not strictly carnivorous fishes. Piranhas generally pose little threat to humans, and attacks on humans are extremely rare. Natives frequently swim in piranha infested water without attacks or scratches. However, it is not recommended to swim where piranha live in drought season because of increased aggressiveness caused by food scarcity and increased tendency to form large schools. Piranha fish also have the same sensory system that enables sharks to detect blood in minuscule amounts, so it is believed that swimming with an open cut may enhance the chance of an attack.

Piranha
Piranha








Designed and Powered by HBJamaica.com™