New species

William T. White and his team of researchers described the distinct characteristics of the roughback bristle shark through meticulous examination of its size, colouring, body structure, texture, dental arrangement, egg cases, and genetic makeup, and published their their study in the journal Fishes. Residing at astonishing depths between 2,200 feet and 3,900 feet, the newfound shark species has, thus far, exclusively inhabited the waters off the western coast of New Zealand's North Island. 

Marine scientists at the Scripps Institution of Oceanography at UC San Diego have discovered a new species of deep-sea worm in the waters near a methane seep about 50 kilometres off Costa Rica's Pacific coast.

Named Pectinereis strickrotti, the worm hails from the ragworm family and is distinguished by their feathery appendages that carry its gills. It was first discovered by Greg Rouse and Bruce Strickrott in 2009 when they were inside the submersible Alvin during an expedition at a depth of 1,000 metres.

Palaeohypotodus, pronounced pale-ee-oh-hype-oh-toe-duss, translates to "ancient small-eared tooth," a reference to the shark's distinctive small needle-like fangs found on the sides of its teeth. Spearheaded by Jun Ebersole, Director of Collections at McWane Science Center in Birmingham, alongside David Cicimurri, Curator of Natural History at South Carolina State Museum, and T. Lynn Harrell, Jr., Paleontologist and Fossil Collections Curator at the Geological Survey of Alabama in Tuscaloosa, the team named the new species in honour of the late Dr.

The deep, emerald waters surrounding Japan's Okinawa Islands are a haven for marine life, and is one of the most biodiverse ecosystems on the planet. Within this vast biodiverse haven, scientists have discovered two new species of pygmy squid lurking beneath the surface: the Ryukyuan Pygmy Squid and Hannan's Pygmy Squid.

These two species have now been described and catalogued, with names that connect them to Japan's cultural heritage. Findings have been published in the Marine Biology journal. 

Today, researchers are using the fossils of the Olympicetus thalassodon an early toothed whale which existed around 26.5 and 30.5 million years ago, to better understand the early history and diversification of modern dolphins, porpoises and other toothed whales. 

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.

While on a mission to map the volcanic geography of Cocos (Keeling) Islands Marine Park off Western Australia, researchers aboard the vessel Investigator also surveyed the deep-sea life in the Indian Ocean Territories.

In doing so, they came face-to-face with many fascinating, and some previously unknown, species.

Besides filming videos of the vast marine life amidst the summits of seamounts, the team also collected specimens from depths as deep as five kilometres below the surface.

We have discovered an amazing number of potentially new species living in this remote marine park

Dr Tim O’Hara, Chief Scientist of the expedition and Senior Curator, Marine Inveterbrates at Museums Victoria Research Institute

During the expedition, the researchers had been sharing their discoveries with more than 850 school students and community members in Australia through real-time livestreaming.

The expedition was a collaboration between Museums Victoria Research Institute and CSIRO, in partnership with Bush Blitz, Parks Australia, Australian Museum Research Institute and the Western Australian Museum.

A new bottlenose dolphin subspecies has been identified, and it is found only in the eastern tropical Pacific Ocean, according to a study published in the Journal of Mammalian Evolution.

Called the Eastern Tropical Pacific bottlenose dolphin (Tursiops truncatus nuuanu), it is smaller than other common bottlenose dolphins, and is likely to prefer the deep offshore waters between southern Baja California and the Galapagos Islands. 

More than 35 potentially new deep-sea species have been discovered at the Clarion-Clipperton Zone (CCZ) in the central Pacific. 

Ranging from starfish and segmented worms to sea cucumbers and various types of coral, these specimens were collected using a remotely operated vehicle.

In total, 55 benthic specimens were collected from seamounts and abyssal plains. Of these, 39 were found to be potentially new to science, with nine that were referable to known species. 

The sea worms, which lived inside their host sponges, were discovered by researchers in Japan. Images of the worms were then sent to Professor M. Teresa Aguado at the University of Göttingen, who subsequently organised a field trip to further investigate the species.

A distinctive feature about the worm—the third species of branched sea worms ever discovered—is the fact that it has dozens of regenerative posterior ends that look like tree branches as they spread out from the main body.