The Great Fiji Shark Count

Counting Fiji's sharks, rays and turtles

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You are here: Home / Archives for species

Manta rays

Manta Ray by Lill Haugen

The manta rays (we count both Manta alfredi and Manta birostris) are the largest of the rays in the family Myliobatidae. The largest known specimen was more than 7.6 metres (25 ft) across, with a weight of about 1,300 kilograms (2,900 lb). It ranges throughout waters of the world, typically around coral reefs.

They have the largest brain-to-body ratio of the sharks, rays and skates (Elasmobranchii), a brain which is kept warm during lengthy dives to as deep as 500 metres (1,600 ft) in cold water.

They are exceptionally graceful swimmers and appear to fly through the water on their large wings. Individuals have also been observed to jump clear out of the water, possibly in a form of communication or play.

More info here…

Ocellated eagle ray

Ocellated eagle ray

The Ocellated eagle ray, Aetobatus ocellatus (Kuhl, 1823) are part of a group of cartilaginous fishes in the family Myliobatidae, consisting mostly of large species living in the open ocean rather than on the sea bottom.More info here…

Leatherback turtle

Leatherback turtle underwater

The leatherfront sea turtle (Dermochelys coriacea), sometimes called the lute turtle, is the largest of all living sea turtles and the fourth largest modern reptile behind three crocodilians.[3][4] It is the only living species in the genus Dermochelys. It can easily be differentiated from other modern sea turtles by its lack of a bony shell. Instead, its carapace is covered by skin and oily flesh. Dermochelys coriacea is the only extant member of the family Dermochelyidae.

More info here…

Loggerhead turtle

Loggerhead Turtle By Alex Hill

The loggerhead sea turtle (Caretta caretta), or loggerhead, is an oceanic turtle distributed throughout the world. It is a marine reptile, belonging to the family Cheloniidae. The average loggerhead measures around 90 centimeters (35 in) long when fully grown, although larger specimens of up to 270 centimeters (110 in) have been discovered. The adult loggerhead sea turtle weighs approximately 135 kilograms (300 lb), with the largest specimens weighing in at more than 454 kilograms (1,000 lb). The skin ranges from yellow to brown in color, and the shell is typically reddish-brown. There are no external differences in gender until the turtle becomes an adult, the most obvious difference being that adult males have thicker tails and shorter plastrons than the females.

The loggerhead sea turtle is found in the Atlantic, Pacific, and Indian oceans as well as the Mediterranean Sea. It spends most of its life in saltwater and estuarine habitats, with females briefly coming ashore to lay eggs. The loggerhead sea turtle has a low reproductive rate; females lay an average of four egg clutches and then become quiescent, producing no eggs for two to three years. The loggerhead reaches sexual maturity within 17–33 years and has a lifespan of 47–67 years.More info here…

Hawksbill turtle

Hawksbill Turtle by Alex Hill

The hawksbill sea turtle (Eretmochelys imbricata) is a critically endangered sea turtle belonging to the family Cheloniidae. It is the only extant species in its genus. The species has a worldwide distribution, with Atlantic and Pacific subspecies. E. imbricata imbricata is the Atlantic subspecies, while E. imbricata bissa is found in the Indo-Pacific region.[2]

The hawksbill’s appearance is similar to that of other marine turtles. It has a generally flattened body shape, a protective carapace, and flipper-like arms, adapted for swimming in the open ocean. E. imbricata is easily distinguished from other sea turtles by its sharp, curving beak with prominent tomium, and the saw-like appearance of its shell margins. Hawksbill shells slightly change colors, depending on water temperature. While this turtle lives part of its life in the open ocean, it spends more time in shallow lagoons and coral reefs.

Human fishing practices threaten E. imbricata populations with extinction. The World Conservation Union. classifies the Hawksbill as critically endangered.[1] Hawksbill shells are the primary source of tortoise shell material, used for decorative purposes. The Convention on International Trade in Endangered Species outlaws the capture and trade of hawksbill sea turtles and products derived from them.

More info here…

Green turtle

Green turtle

The Green sea turtle (Chelonia mydas), also known as green turtle, black (sea) turtle, or Pacific green turtle,[3] is a large sea turtle of the familyCheloniidae. It is the only species in the genus Chelonia.[4] Its range extends throughout tropical and subtropical seas around the world, with two distinct populations in the Atlantic and Pacific Oceans.[5] Their common name derives from the usually green fat found beneath their carapace (upper shell).

The green sea turtle is a sea turtle, possessing a dorsoventrally flattened body covered by a large, teardrop-shaped carapace and a pair of large, paddle-likeflippers. It is usually lightly colored, although parts of the carapace can be almost black in the eastern Pacific. Unlike other members of its family, such as thehawksbill sea turtle and loggerhead sea turtle, C. mydas is mostly herbivorous. The adults commonly inhabit shallow lagoons, feeding mostly on various species of seagrasses.[6]More info here…

Whitetip reef shark

White Tip Shark Header

The whitetip reef shark (Triaenodon obesus) is a species of requiem shark, family Carcharhinidae, and the only member of its genus. A small shark usually not exceeding 1.6 m (5.2 ft) in length, this species is easily recognizable by its slender body and short but broad head, as well as tubular skin flaps beside the nostrils, oval eyes with vertical pupils, and white-tipped dorsal and caudal fins. One of the most common sharks found on Indo-Pacificcoral reefs, the whitetip reef shark occurs as far west as South Africa and as far east as Central America. It is typically found on or near the bottom in clear water, at a depth of 8–40 m (26–130 ft).

Simple identification points:

  • Rounded nose, white tip on dorsal fin (back fin) and tail fin
  • Small; largest around 2 metres long
  • Found on or near shallow coral reefs
  • In daytime rests on sandy slopes and caves, sitting motionless
  • At night feed on crabs, lobster, octopus and fish sleeping in holes in the reef
  • Give birth to 1 – 5 live babies
  • Stay within a few kilometers of their home range

More info here…

Grey reef shark

Grey_reef_shark_Header

The grey reef shark (Carcharhinus amblyrhynchos, sometimes misspelled amblyrhynchus or amblyrhinchos)[2] is a species of requiem shark, familyCarcharhinidae. One of the most common reef sharks in the Indo-Pacific, it is found as far east as Easter Island and as far west as South Africa. This species is most often seen in shallow water near the drop-offs of coral reefs. The grey reef shark has the typical “reef shark” shape, with a broad, round snout and large eyes. This species can be distinguished from similar species by the plain or white-tipped first dorsal fin, the dark tips on the other fins, the broad black rear margin on the tail fin, and the lack of a ridge between the dorsal fins. Most individuals are less than 1.9 m (6.2 ft) long.More info here…

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Welcome to The Great Fiji Shark Count !

Throughout the months of April and November every year, you have the opportunity to help celebrate and record Fiji’s amazing coral reef biodiversity, show you care about our world’s delicate coral reef systems, and have fun, by taking part in the FIJI-WIDE SHARK COUNT!

Easy to do, this is suitable for visitors and locals alike, whether you like to fish, snorkel, or SCUBA dive. We hope that tourists, school children, scientists and all people with an interest in the marine environment will take to the reefs with us to search for the Sharks of Fiji!

The Great Fiji Shark Count will be held across Fiji every April and November every year.

You can do a single count, or take part as many times as you like during that month, so that you cover different reefs. All data will be gratefully accepted!

So, see your resort, watersports operator or travel agent, get your Shark identification materials and dive into the beautiful blue waters of Fiji, to be a part of history!

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