sharks and rays

Home sealife sharks and rays Page 3
Sawfish

Extinction Threatens Quarter of Sharks and Rays

A quarter of sharks and rays are threatened with extinction. Large, shallow-water species are at most risk. The Indo-Pacific, particularly the Gulf of Thailand, and the Mediterranean Sea are the two ‘hotspots’ where the depletion of sharks and rays is most dramatic. The Red Sea is also home to a relatively high number of threatened sharks and rays.
Shark feed - Tiger Shark

Shark Feeding Dives change Relative Abundances of Sharks

Shark feeding dives are increasing, yet are controversial. Shark tourism has great economic benefits, and can help shark conservation. What are the drawbacks?
Great white shark

Great White Sharks Live more than 70 Years

Great white sharks may be among the longest-lived fishes. New study finds the shark can live over three times longer than previously estimated, which may mean it is even more vulnerable than thought.
Lion's Mane Jellyfish

Have you seen Basking Sharks, Jellyfish or Turtles in UK Waters?

The Marine Conservation Society wants to know if you’ve seen any basking sharks, turtles or jellyfish – in UK and Irish waters. Jellyfish? Yes, because...
Manta Ray

Manta Ray is Creature of the Month

The Giant Manta Ray is the largest living ray and a very impressive sight underwater. Mantas migrate vast distances, crossing international boundaries, in search of food. Products from manta rays have a high value in international markets, and targeted fisheries hunt them for their valuable gill rakers used in traditional Chinese medicine. Monitoring and regulation of the exploitation and trade of manta rays is urgently needed, as well as protection of key habitats.
White tip reef shark

Will Marine Reserve Protect Coral Sea Sharks?

Shark fishing needs to be banned at Osprey and Shark Reef in the Coral Sea for a Marine Reserve to work, concludes a study published yesterday. It is estimated that each year, live-aboard dive boats are directly responsible for generating at least AU$16 M worth of income. Of all the Coral Sea reef systems, Osprey Reef has the highest visitation rate by tourism operators, primarily to conduct shark dives. So, the depletion of reef sharks at Osprey Reef would have serious financial ramifications for the area. To put this into perspective, in the Maldives, the removal of only 20 grey reef sharks, with a market value of only AU$1 000, caused an estimated loss of AU$500 000 annually in diving revenue.
Sharks in the Pacific

Scientists say 90% Shark Loss at Populated Pacific Islands

Pairs of SCUBA divers towed behind a small boat have been recording shark numbers at both heavily populated Pacific islands and islands away from...

World-first discovery of hybrid sharks off Australia’s east coast

Scientists have discovered that sharks on Australia's east coast display a mysterious tendency to interbreed, challenging several accepted scientific theories regarding shark behaviour. The...
Whale shark

Creature of the Month: Whale Shark

The biggest fish in the sea feeds on microscopic plankton. A filter feeder, the Whale Shark's gills are specially modified to act like a...
Manta Ray

Mantas and Tuna on Red List of Endangered Species

The latest update of The IUCN Red List of Threatened Species reveals two species of Manta Ray are vulnerable, and the situation is particularly serious for tunas. Among the marine species classified as critically endangered – the most serious risk category – are staghorn and elkhorn coral, the hawksbill turtle and the Mediterranean Monk Seal. The marine realm though is very poorly covered in the IUCN Red List, comprising less than 5% of the species included.