Agriculture
Silks superpowers
Earth-Friendly Fabrics
Treating peanut allergy bit by bit
Amphibians
Salamanders and Newts
Toads
Salamanders
Animals
New Monkey Business
A Jellyfish's Blurry View
A Butterfly's New Green Glow
Behavior
Girls are cool for school
Making light of sleep
Eating Troubles
Birds
Mockingbirds
Rheas
Eagles
Chemistry and Materials
Putting the Squeeze on Toothpaste
The Incredible Shrunken Kids
Picture the Smell
Computers
Earth from the inside out
Hubble trouble doubled
Troubles with Hubble
Dinosaurs and Fossils
Supersight for a Dino King
Digging Dinos
Dino Bite Leaves a Tooth
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
A Volcano's Deadly Ash
Coral Gardens
Ancient Heights
Environment
Plant Gas
Island Extinctions
Flu river
Finding the Past
Childhood's Long History
Oldest Writing in the New World
Little People Cause Big Surprise
Fish
Sturgeons
Angler Fish
Skates
Food and Nutrition
How Super Are Superfruits?
The Color of Health
Recipe for Health
GSAT English Rules
Capitalization Rules
Pronouns
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
GSAT Practice Papers | GSAT Mathematics | Maths
Preparing for the GSAT Exam
42,000 students will sit for the GSAT Exam in two weeks
GSAT Exams Jamaica Scholarships
GSAT Scholarship
GSAT Exam Preparation
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Mathematics
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Monkeys Count
10 Common Mistakes When Preparing for the GSAT Math Test
Human Body
Spit Power
Cell Phones and Possible Health Hazards
What the appendix is good for
Invertebrates
Black Widow spiders
Scallops
Flies
Mammals
Ferrets
African Warthogs
Manatees
Parents
Children and Media
What Not to Say to Emerging Readers
How children learn
Physics
Project Music
Dreams of Floating in Space
The Mirror Universe of Antimatter
Plants
Hungry bug seeks hot meal
The algae invasion
A Giant Flower's New Family
Reptiles
Rattlesnakes
Caimans
Black Mamba
Space and Astronomy
Witnessing a Rare Venus Eclipse
Ringing Saturn
Burst Busters
Technology and Engineering
Are Propellers Fin-ished?
Supersuits for Superheroes
Morphing a Wing to Save Fuel
The Parts of Speech
What is a Preposition?
Countable and Uncountable Nouns
Pronouns
Transportation
Robots on the Road, Again
Reach for the Sky
Troubles with Hubble
Weather
Warmest Year on Record
Where rivers run uphill
A Dire Shortage of Water
Add your Article

Manta Rays

The manta ray, or giant manta (Manta birostris), is the largest of the rays, ranging up to 6.7 meters (22 ft) across its pectoral fins (or "wings") and weighing up to 1,350 kg (3,000 lb). It ranges throughout the tropical seas of the world, typically around coral reefs. Mantas are most commonly black above and white below, but some are blue on their backs. A giant manta's eyes are located at the base of the cephalic fins on each side of the head, and unlike other rays the mouth is found at the anterior edge of its head. To breathe, the manta has like other rays five pair of gills on the underside. With distinctive "horns", or "cephalic fins", on either side of its broad head, the manta is a prized sighting by divers. These unique horns are actually structures made by the pectoral fins where a part breaks off during the embryological stage and moves foreward and surrounds the mouth, which makes them the only known example where jawed vertebrates have evolved novel limbs (the so-called six-footed tortoise (Manouria emys) has of course not actually six legs, only enlarged tuberculate scales present on their thighs that looks a bit like an extra pair of hind limbs). These flexible horns are also called cephalic fins and are used to direct plankton and water into their very broad and wide mouth. To make them more streamlined when swimming, they are able to curl them up. They evolved from bottom feeders a long time ago, but later adapted to become filter feeders in the open ocean. This has allowed them to grow to a size larger than any other species of rays. Because of their pelagic lifestyle as plankton feeders, some characterstics have been degenerated. All that is left of their oral teeth is a small band of vestigial teeth on the lower jaw, almost hidden by the skin. They are closely related to stingrays, but they don't have any stinger. Also their dermal denticals are greatly reduced in number and size, but are still present, and they have a much thicker body mucus coating than other rays. Their spiracles have become small and non-functional, all the water is taken in through their mouth instead. To better swim through the ocean, they have evolved a diamond shaped body plan, using their pectoral fins as graceful "wings". Mantas generally eat plankton, fish larvae and small organisms that are filtered out from the water by their gill rakers, a type of filter feeding that is called ram-jet feeding. Taxonomically, the situation of the mantas is still under investigation. Three species have been identified: Manta birostris, Manta ehrenbergii, and Manta raya, but they are quite similar to each other, and the last two may just be isolated populations. The genus Manta is sometimes placed in its own family, Mobulidae, but this article follows FishBase, and places it in the family Myliobatidae, with the eagle rays and their relatives. Mantas have been given a variety of common names, including Atlantic manta, Pacific manta, devil ray, devilfish, and just manta. Some people just call all members of the family stingrays. Mantas have recently been captured on film while breaching. This had been reported in the past, but without any conclusive evidence. In the last few years, sharks have also been photographed while leaping out of the water. As with sharks, the reason for this behavior in rays is currently unknown, though may be to dislodge loose dead skin & parasites when impacting back on the water.

Manta Rays
Manta Rays








Designed and Powered by HBJamaica.com™