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Sea otters bounce back but fall prey to great whites
Sea otters bounce back but fall prey to great whites

White sharks complicate population recovery for sea otters

Complex interactions and conflicts between protected populations may challenge the recovery of whole ecosystems. Several factors indicate that white sharks may be currently limiting the recovery of California sea otters.

Protected white sharks (Carcharodon carcharias) and pinnipeds have an established predator–prey relationship along the California coast.

USS Samuel B. Roberts on the seabed
USS Samuel B. Roberts on the seabed. Victor Vescovo's team made six dives in search of the vessel.

World's deepest shipwreck located

Victor Vescovo, the founder of exploration company Caladan Oceanic, and a team from EYOS Expeditions made six dives over eight days looking for the long-lost WW2 destroyer which was located on 22 June. It lies at a depth of 6,895 meters (22,621 feet), in the Philippine Sea, split in two and lodged on a slope.

Speaking to CNN, Vescovo called it an "honor" to find the ship, saying in a statement that locating it had given the team the chance "to retell her story of heroism and duty."

The emergence of TB in Peru likely came from marine mammals such as seals and sea lions.
The emergence of TB in Peru likely came from marine mammals such as seals and sea lions.

Did marine mammals cause emergence of tuberculosis in the Americas?

DNA research has shown that Mycobacterium pinnipedii, which today causes tuberculosis (TB) primarily in pinnipeds, infected human populations living in the coastal areas of Peru prior to European colonisation

The earliest cases are found in Peru and northern Chile and are dated to ~700 CE, with possible cases occurring as early as 290 CE.

Ribbon weed, Posidonia australis, meadow in Shark Bay, Western Australia
Ribbon weed, Posidonia australis, meadow in Shark Bay, Western Australia

Single seagrass plant stretches 180km

Large, perennial, seagrass meadows of the Poseidon’s ribbon weed and the wire weed (Amphibolis antarctica) dominate much of the marine ecosystem in the UNESCO World Heritage Site of Shark Bay, Australia.

Two years ago, scientists discovered some of the seagrass there was a clone of a Poseidon’s ribbon weed (Posidonia australis) that had 40 chromosomes instead of the typical 20. They think half those chromosomes may come from the ribbon weed and half from an unknown species.

DRYFOB Releases New Sizes of Waterproof Containers for Scuba Diving

DRYFOB, a Miami, Florida based LLC introduced its signature DRYFOB waterproof car key container in May of 2021. Just over a year later, the company has announced two new sizes of DRYFOB as well as a newly achieved certification to 330ft (100m).

Nathalie Martel, inventor and founder of DRYFOB, and a master scuba diver, states: “We’ve had a tremendous reception from the diving community for the DRYFOB, and it is always a great feeling when someone tells us that they’ve been looking for a product like the DRYFOB for years."

Mark Powell is going to be a presenter again at this year's Diving Talks
Mark Powell is going to be a presenter again at this year's Diving Talks

Diving Talks lining up a stellar list of presenters

My 28 years as a dive industry professional have taken me to 130-140 dive shows, events and conferences. So perhaps it is understandable that I sometimes feel a little jaded or unenthusiastic about heading out for yet another one.  Many of the dive shows become same-same-ish and the dealings routine.

There are but a few left that I genuinely look forward to and the upcoming Diving Talks, held in Portugal in October, is one of them.

Get your Tickets here

Dive Palau with Explorer Ventures, a new addition to the Fleet!

Set sail in the oasis of Palau, now with Explorer Ventures Fleet! This May, the state-of-the-art Black Pearl Explorer joined the world-renowned liveaboard company, in partnership with Pearl Fleet.

Black Pearl Explorer offers three incredible itineraries, including Palau Classic visiting all the famous dive sites. Plus, two Spawning Special itineraries for divers to see the rare spawning aggregations of bumphead parrot fish and red snappers.

An octopus, sea star, bivalves and dozens of cup coral all share the same overhang in an area adjacent to the Hudson Canyon off the coast of New York and New Jersey.

Underwater Canyon Could Become America’s Newest Marine Sanctuary

Hudson Canyon is the largest underwater canyon along the U.S. Atlantic Coast, and is about 100 miles off the coast of New York and New Jersey. The canyon ⁠— about 2 to 2.5 miles deep and up to 7.5 miles wide ⁠— provides habitat for a range of protected and sensitive species, including sperm whales, sea turtles and deep sea corals.

The canyon’s rich biodiversity is integral to the region’s economy, underpinning commercial and recreational fisheries, recreational diving, whale-watching and birding.