Tag

Deep Sea Biology

All articles tagged with #deep sea biology

science1 month ago•12 min saved

Oceanic Titans: The 10 Largest Marine Creatures in History

The piece explains why the ocean fosters gigantism—buoyancy lightens bones, thermoregulation favors larger bodies, and deep-sea energy sources support long growth—and then surveys 10 of the largest marine creatures, from the living blue whale (up to ~33 m) and fin whales to extinct giants like Megalodon, Perucetus colossus and Ichthyotitan severnensis, with notes on debated sizes (e.g., Nanaimoteuthis haggarti) and the inclusion of extraordinary coral colonies as massive ocean-scale structures.

via BBC Wildlife Magazine|

#blue-whale #deep-sea-biology #largest-marine-animals

science2 months ago•11 min saved

Whale falls turn dead giants into decades-long deep-sea oases

When a whale sinks to the abyssal seafloor, it creates a whale fall that can host up to 190 species around a single skeleton. Bone‑eating Osedax worms feed on the bones for up to a decade, while bacteria release hydrogen sulfide to sustain chemosynthetic communities. These processes create a long-lasting deep-sea ecosystem observed at depths of about 4,000–6,800 meters, though the total number of active whale falls globally remains unknown.

via Space Daily|

#bone-eating-worms #chemosynthesis #deep-sea-biology

science2 months ago•5 min saved

Indian Ocean whale graveyard unlocks vast deep-sea ecosystems

Chinese researchers using the Fendouzhe submersible documented what appears to be the world’s largest whale graveyard in the Indian Ocean’s Diamantina Zone, with about 485 fossil skeletons and an estimated 10 million carcasses over a 1,200-km area, dating as far back as 5.3 million years. The site supports vibrant deep-sea life around whale falls and stores roughly 6.7 million tonnes of carbon, linking these events to hydrothermal-vent ecosystems and offering new insights into whale evolution; the team also identified a new whale species.

via CBS News|

#beaked-whales #carbon-sequestration #deep-sea-biology

science4 months ago•4 min saved

Antarctic Whale Fall Reveals Hidden Deep-Sea Food Web

A 10.7-meter Antarctic minke whale skeleton found at 1,444 meters near the South Sandwich Islands marks the first natural whale fall observed in Antarctic waters. In the sulfophilic stage, bacteria on decomposing bones generate chemical energy that sustains a new deep-sea community, including nine previously unknown species and bone-eating Osedax worms, with colonization linked to bone lipid content via the oil-gradient hypothesis. The ecosystem is powered by chemosynthesis rather than sunlight, and decomposition can take years to decades; researchers also note unresolved questions on how such isolated prey sources are located in the vast ocean and how whale falls connect to hydrothermal-vent habitats in polar regions.

via Indian Defence Review|

#antarctica #chemosynthesis #deep-sea-biology

science6 months ago•5 min saved

First Live Sighting Reframes the Ginkgo-Toothed Beaked Whale’s Range

Scientists confirmed the first live sighting of the ginkgo-toothed beaked whale (Mesoplodon ginkgodens) off Baja California in 2024 after a five-year search tracking a distinctive BW43 call. Using hydrophones aboard the Pacific Storm, researchers observed a young whale with an adult male, collected a skin biopsy that DNA analysis confirmed the species, and concluded the whales likely inhabit California and northern Baja waters year‑round, prompting a reassessment of the species’ range and highlighting beaked whales’ sensitivity to sonar.

via The Daily Galaxy|

#beaked-whale #deep-sea-biology #ginkgo-toothed-beaked-whale

science6 months ago•3 min saved

Deep-Sea Larvae Unveil Hybrid Photoreceptors, Redefining Twilight Vision

Researchers have identified a previously unknown photoreceptor in larval deep-sea fish that combines cone-like molecular machinery with rod-like structure, creating a twilight-optimized cell that challenges the long-held view that vertebrate vision relies solely on cones for bright light and rods for darkness. The finding, observed in Maurolicus muelleri and Maurolicus mucronatus larvae, could inform low-light imaging technologies and offer new avenues for understanding human eye conditions such as glaucoma.

via SciTechDaily|

#deep-sea-biology #hybrid-cell #photoreceptors