Agriculture
Chicken Eggs as Drug Factories
Keeping Bugs Away from Food
Watering the Air
Amphibians
Salamanders and Newts
Newts
Salamanders
Animals
Living in the Desert
From Chimps to People
A Wild Ferret Rise
Behavior
Slumber by the numbers
Wake Up, Sleepy Gene
Lost Sight, Found Sound
Birds
Pigeons
Storks
Carnivorous Birds
Chemistry and Materials
Boosting Fuel Cells
The metal detector in your mouth
Fog Buster
Computers
Galaxies far, far, far away
The Shape of the Internet
Batteries built by Viruses
Dinosaurs and Fossils
South America's sticky tar pits
Ferocious Growth Spurts
Did Dinosaurs Do Handstands?
E Learning Jamaica
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Earth
Quick Quake Alerts
Earth from the inside out
The Rise of Yellowstone
Environment
When Fungi and Algae Marry
Sea Otters, Kelp, and Killer Whales
Sounds and Silence
Finding the Past
Stone Tablet May Solve Maya Mystery
Watching deep-space fireworks
Stonehenge Settlement
Fish
Saltwater Fish
Halibut
Sting Ray
Food and Nutrition
Making good, brown fat
The mercury in that tuna
Packing Fat
GSAT English Rules
Whoever vs. Whomever
Pronouns
Problems with Prepositions
GSAT Exam Preparation Jamaica
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT Practice Papers | GSAT Mathematics | Maths
2014 GSAT Results for Jamaican Kids
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Exam Preparation
Results of GSAT are in schools this week
GSAT Mathematics
Deep-space dancers
Math Naturals
10 Common Mistakes When Preparing for the GSAT Math Test
Human Body
A Long Haul
Prime Time for Broken Bones
Hey batter, wake up!
Invertebrates
Scallops
Mussels
Wasps
Mammals
Bison
Rhinoceros
Dachshunds
Parents
What Not to Say to Emerging Readers
Expert report highlights the importance to parents of reading to children!
Raise a Lifelong Reader by Reading Aloud
Physics
Electric Backpack
IceCube Science
The Pressure of Scuba Diving
Plants
Fastest Plant on Earth
A Change in Leaf Color
Farms sprout in cities
Reptiles
Anacondas
Komodo Dragons
Crocodiles
Space and Astronomy
No Fat Stars
Solving a Sedna Mystery
Baby Star
Technology and Engineering
Shape Shifting
Dancing with Robots
Reach for the Sky
The Parts of Speech
Pronouns
Countable and Uncountable Nouns
What is a Verb?
Transportation
Morphing a Wing to Save Fuel
Troubles with Hubble
Seen on the Science Fair Scene
Weather
Catching Some Rays
The solar system's biggest junkyard
Science loses out when ice caps melt
Add your Article

Parrotfish

Parrotfishes are mostly tropical, perciform marine fish of the family Scaridae. Abundant on shallow reefs of the Atlantic, Indian and Pacific Oceans, the parrotfish family contains ten genera and about 80 species. Fish or Fowl? Parrotfishes are named for their oral dentition: their numerous teeth are arranged in a tightly packed mosaic on the external surface of the jaw bones, forming a parrot-like beak which is used to rasp algae from coral and other rocky substrates. Many species are also brightly colored in shades of blue, green, red and yellow, but are not especially popular in aquaria. Maximum sizes vary widely within the family, from 20 cm in the smallest species, such as the green parrotfish (Leptoscarus viagiensis) to 1.5 m in the largest species, Bolbometopon muricatum. Change is Good: The development of parrotfishes is complex and accompanied by a series of changes in coloration termed polychromatism. For most species, adult males and females have different colors, the females usually displaying drab tones of green, brown or gray, and the males vivid, conspicuous colours. Dressed in their Best: In the mediterranean parrotfish, it is the females that have vivid coloration with the males being drab gray. In most species, the juveniles have a different color pattern than the adults and some tropical species this juvenile coloration can be altered temporarily to mimic the appearance of other species. Arrested Adolescence: As the juveniles mature they enter what is termed the initial phase coloration during which they may change color and sex. For most species, initial phase fishes are usually males that have the beginnings of the adult male coloration. However, initial phase fishes may include sexually mature females. The high variability in coloration of parrotfish has led to the different phases of many species being erroneously classified as different species in the past. Coloration is highly variable even among members of the same species. This "identity crisis" is shared by their close relatives, the wrasses of the family Labridae. Dinner Time: Although they are considered to be herbivores, parrotfish eat a wide variety of organisms that live on coral reefs. Some species, for example Bolbometopon muricatum may include living corals (polyps) in their diet. Their feeding activity is important for the production and distribution of coral sands in the reef biome and can prevent algae from choking coral. Ingested during feeding, coral rock is ground up by the pharyngeal teeth. Camping Out: Parrotfishes are diurnal and stay within shallow waters of no more than about 70 meters in depth. By night they cram themselves into crevices, some species secreting a thick coat of mucus as a sort of sleeping bag. The mucus is thought to mask their scent from nocturnal predators and may serve to protect the fish from infection by parasites. It should also be noted that, after a massive die-out of the sea urchins in the Caribbeans, parrotfish now are the main grazers in the area. School's Out: Known as the "ruminants of the sea," grazing parrotfish of most tropical species form large schools grouped by size. Harems of several females presided over by a single male are the norm in other species, the males vigorously defending their status if challenged. Curiously, if the dominant male of a harem is removed, one of the females will change sex and adopt the terminal male coloration. Parrotfish are pelagic spawners; that is, they release many tiny buoyant eggs into the water which become part of the plankton. The eggs float freely, settling into the substrate until hatching.

Parrotfish
Parrotfish








Designed and Powered by HBJamaica.com™