Sharks

Ecotourism, particularly shark diving tourism, has become a significant global industry, attracting over half a million participants annually across approximately 85 countries. While it generates substantial revenue and raises awareness for shark conservation, concerns about its impact on shark behaviour and health, as well as human safety, persist.

Ecotourism has been posited as a potential solution to many of the issues facing shark conservation, yet increasingly studies suggest that such activity may negatively influence aspects of shark ecology and so further pressure declining populations.

^{— Joel H. Gayford, et al.}

The painted hornshark resembles the zebra bullhead shark, Heterodontus zebra, in its dark bar and saddle colouring, but the difference lies in the colouring of the tip of the snout and its fins. 

The painted hornshark features a bifurcated, semicircular dark bar on its snout, while the zebra bullhead shark has a pointed triangular marking. Additionally, the painted hornshark lacks the dark bar extending from below the gill slits to the pectoral fins, which is present in the zebra bullhead shark.

According to research, some sharks relocate to deeper, calmer seas well in advance of when people forecast powerful hurricanes. Sharks are now being marked in an effort to gather data that cannot be obtained by conventional ocean equipment..

Recent scientific research has begun to challenge the long-standing perception of sharks as solitary hunters. Rather, it reveals their complex social structure that is borne out of a high level of cognitive function.

In fact, these studies suggest that sharks possess a level of social intelligence, problem-solving skills and even emotional intelligence that far surpass previous beliefs, offering a fresh perspective on their behaviour and potential sentience.

Two male great white sharks named "Jekyll" and "Simon", tagged off Georgia's coast in December, displayed a groundbreaking migration pattern.

From April, Jekyll and Simon's joint journey saw them traverse the Atlantic Coast, passing places like Ocracoke and Virginia Beach in a synchronised manner. While sharks sometimes gather for mating or feeding, their migrations are usually solitary.

In a bid to learn more about ghost sharks, researchers from the University of Florida (UF) and the Seattle Aquarium are using remotely operated vehicles (ROVs) to explore the oceanic depths 100 meters below the surface of the Pacific Northwest.

In particular, they want to find the nesting grounds of the Pacific spotted ratfish, as currently very little is known about their spawning habits and embryonic development.

The team had been gathering material for the David Attenborough documentary Our Planet II. They were operating an inflatable boat around the Laysan area of Northwestern Hawaiian Islands in order to capture footage of tiger sharks consuming young albatross fledglings.

Brazil's environmental protection agency, Ibama, estimated that approximately 11,000 blue sharks and shortfin mako sharks, which Brazil listed as endangered last month, were killed.

The fins, which were destined for Asia, where shark fin soup is considered a delicacy, were found in two locations.

Most sharks give birth to live young, but a few species, known as oviparous sharks, lay eggs. The new species could be identified because researchers noticed something interesting about its egg cases, pouches that attach to a surface in the ocean and hold onto a fertilized shark eggs as it develops.