The Deep Sea

Good job as always, Cnidaria, you scary fucking phylum.

cross-posted from: https://lemmy.world/post/33778892

cross-posted from: https://lemm.ee/post/61445995

Delving into the evolutionary past of the enigmatic deep-sea vampire squid, Vampyroteuthis infernalis, has long been a pursuit shrouded in mystery. However, recent discoveries, such as a remarkable specimen unearthed from the Early Jurassic of Luxembourg, are shedding new light on the early anatomy of vampyromorphs.

Enter Simoniteuthis michaelyi, a newfound taxon that has captured the attention of researchers worldwide. This remarkable creature, based on a nearly complete pen accompanied by a head-arm complex, is a brilliantly preserved fossil.

What makes Simoniteuthis truly intriguing is its unusual arm crown, boasting only four arm pairs instead of the expected five. This anomaly challenges our understanding of vampyromorph anatomy.

But the surprises don’t end there. Examination of the specimen’s mouth region reveals evidence of predation on two bony fishes. The two animals died in the act of predation, i.e. one had caught the other and had begun to nibble on it, when they possibly sank into hypoxic waters and suffocated.

Unlike its modern descendant, Vampyroteuthis infernalis, Simoniteuthis inhabited shallower waters, reminiscent of Mesozoic vampyromorphs. This divergence in habitat and hunting behavior offers valuable insights into the evolutionary trajectory of these captivating creatures.

Through meticulous analysis of the fossil record, researchers speculate that vampyromorphs began a vertical migration into deeper waters, possibly driven by shifts in feeding behavior, as early as the Oligocene epoch.

Fuchs, Dirk, Robert Weis, and Ben Thuy. “Simoniteuthis, a new vampyromorph coleoid with prey in its arms from the Early Jurassic of Luxembourg.” Swiss Journal of Palaeontology 143.1 (2024): 1-10.

KEY LARGO, Fla. (AP) — A university professor broke a record for the longest time living underwater without depressurization this weekend at a Florida Keys lodge for scuba divers.

Joseph Dituri’s 74th day residing in Jules’ Undersea Lodge, situated at the bottom of a 30-foot-deep lagoon in Key Largo, wasn’t much different than his previous days there since he submerged March 1.

Dituri, who also goes by the moniker “Dr. Deep Sea,” ate a protein-heavy meal of eggs and salmon prepared using a microwave, exercised with resistance bands, did his daily pushups and took an hour-long nap. Unlike a submarine, the lodge does not use technology to adjust for the increased underwater pressure.

The previous record of 73 days, two hours and 34 minutes was set by two Tennessee professors — Bruce Cantrell and Jessica Fain — at the same location in 2014.

But Dituri isn’t just settling for the record and resurfacing: He plans to stay at the lodge until June 9, when he reaches 100 days and completes an underwater mission dubbed Project Neptune 100.

The mission combines medical and ocean research along with educational outreach and was organized by the Marine Resources Development Foundation, owner of the habitat.

“The record is a small bump and I really appreciate it,” said Dituri, a University of South Florida educator who holds a doctorate in biomedical engineering and is a retired U.S. Naval officer. “I’m honored to have it, but we still have more science to do.”

His research includes daily experiments in physiology to monitor how the human body responds to long-term exposure to extreme pressure.

“The idea here is to populate the world’s oceans, to take care of them by living in them and really treating them well,” Dituri said.

The outreach portion of Dituri’s mission includes conducting online classes and broadcast interviews from his digital studio beneath the sea. During the past 74 days, he has reached over 2,500 students through online classes in marine science and more with his regular biomedical engineering courses at the University of South Florida.

While he says he loves living under the ocean, there is one thing he really misses.

“The thing that I miss the most about being on the surface is literally the sun,” Dituri said. “The sun has been a major factor in my life – I usually go to the gym at five and then I come back out and watch the sunrise.”

https://www.thisiscolossal.com/2024/02/underwater-photographer-of-the-year/