Agriculture
Flush-Free Fertilizer
Got Milk? How?
New Gene Fights Potato Blight
Amphibians
Frogs and Toads
Salamanders and Newts
Tree Frogs
Animals
Vent Worms Like It Hot
Elephant Mimics
Bee Disease
Behavior
Two monkeys see a more colorful world
Brain cells take a break
A Grim Future for Some Killer Whales
Birds
Swifts
Quails
Crows
Chemistry and Materials
Small but WISE
Boosting Fuel Cells
Pencil Thin
Computers
Batteries built by Viruses
Nonstop Robot
The Shape of the Internet
Dinosaurs and Fossils
Hall of Dinos
Some Dinos Dined on Grass
A Dino King's Ancestor
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
Bugs with Gas
Warmest Year on Record
Coral Islands Survive a Tsunami
Environment
Pollution Detective
Saving Wetlands
A Change in Time
Finding the Past
The Taming of the Cat
Stone Age Sole Survivors
A Big Discovery about Little People
Fish
Sharks
Cleaning Up Fish Farms
Flounder
Food and Nutrition
Strong Bones for Life
The Color of Health
Symbols from the Stone Age
GSAT English Rules
Who vs. That vs. Which
Whoever vs. Whomever
Adjectives and Adverbs
GSAT Exam Preparation Jamaica
42,000 students will sit for the GSAT Exam in two weeks
10 Common Mistakes When Preparing for the GSAT Math Test
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
42,000 students will sit for the GSAT Exam in two weeks
GSAT stars reap scholarship glory
GSAT Mathematics
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
How to Slice a Cake Fairly
GSAT Practice Papers | GSAT Mathematics | Maths
Human Body
Spit Power
Heavy Sleep
Gut Germs to the Rescue
Invertebrates
Leeches
Flatworms
Mosquitos
Mammals
Blue Whales
Seal
Asian Elephants
Parents
Children and Media
Choosing a Preschool: What to Consider
Raise a Lifelong Reader by Reading Aloud
Physics
Einstein's Skateboard
Powering Ball Lightning
Strange Universe: The Stuff of Darkness
Plants
Getting the dirt on carbon
When Fungi and Algae Marry
The algae invasion
Reptiles
Box Turtles
Tortoises
Cobras
Space and Astronomy
Sounds of Titan
Mercury's magnetic twisters
Cool as a Jupiter
Technology and Engineering
Spinach Power for Solar Cells
A Light Delay
Sugar Power for Cell Phones
The Parts of Speech
Problems with Prepositions
What is a Noun
Pronouns
Transportation
Charged cars that would charge
Seen on the Science Fair Scene
Revving Up Green Machines
Weather
A Dire Shortage of Water
Earth's Poles in Peril
Recipe for a Hurricane
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™