Antarctic/Pacific deep-slope: sleeper first filmed South Shetland 500m, CSIRO Coral Sea 110+ new spp, goblin jaw, Greenland 392-512yr longevity, US deep sharks
Key Questions
What milestone was achieved with the Antarctic sleeper shark?
For the first time, a mottled sleeper shark (Somniosus antarcticus) was filmed at 500m in South Shetland Islands, Antarctica, via remote camera. Warming risks are a concern for this deep-slope species.
How long can Greenland sharks live?
Greenland sharks can live 392-512 years, determined by eye lens radiocarbon dating in the Arctic. One was estimated alive since around 1627.
What new species were discovered in the Coral Sea?
CSIRO's expedition found 110+ new species, including Apristurus catsharks, Chimaera chimaeras, and sand tigers at 200-3000m depths. This expands knowledge of Pacific deep-slope biodiversity.
What unique feature does the goblin shark have?
Goblin sharks possess protrusible jaws that extend dramatically for prey capture, unchanged for 125 million years. They inhabit deep waters.
What deep-sea sharks live off US waters?
US deep waters host some of the deepest-dwelling sharks, including frilled sharks and others with electro-senses for navigation in darkness.
What shark was found at Kavachi volcano?
Silky and hammerhead sharks thrive as extremophiles at Kavachi volcano, enduring harsh chemosynthetic conditions.
Why are deep-sea sharks like sleepers significant?
Antarctic sleeper sharks at 500m highlight vulnerable deep ecosystems facing climate change. Footage reveals rarely seen behaviors.
What adaptations do deep-slope sharks have?
Deep sharks like goblin and frilled use electro-senses and specialized jaws for the dark abyss. Longevity, as in Greenland sharks, aids survival.
CONFIRMED Antarctic South Shetland 500m mottled sleeper first filmed remote cam Somniosus antarcticus warming risks; Greenland 392-512yr lifespan eye lens Arctic; CSIRO Coral Sea Apristurus/Chimaera/sand tiger 200-3000m; goblin protrusible jaws; frilled shark; electro-senses; Kavachi volcano silky/hammers extremophile.