#deepsea

theconversation.com

Comment les « avalanches » sous-marines transportent les plastiques jusqu’aux abysses

Où est passé le plastique manquant des océans ? Les courants de turbidité liés à l’écoulement des sédiments côtiers les transportent vers les fonds marins.

en.killbait.com

Deep-sea fish observed walking backwards for first time, study reveals

A groundbreaking study has documented the first-ever footage of a deep-sea fish walking backwards, a behavior previously unrecorded in fish species. Researchers from Sun Yat-sen University and the Southern Marine Science and Engineering Guangdong Laboratory observed three species of armored searobin (Scalicus engyceros, Paraheminodus murrayi, and Peristedion liorhynchus) in their natural habitat in the northern South China Sea using remotely operated and human-occupied vehicles. The armored searobin, commonly referred to as a 'fish-prawn hybrid' due to its unique appearance combining fish-like body with shrimp-like appendages, was filmed using specialized rays extending from its pectoral fins to move along the seafloor. The footage confirmed that these fish can walk not only forwards and sideways but also backwards using their free pectoral-fin rays. The study, published in the journal Ocean-Land-Atmosphere Research, provides a rare glimpse into the behavior of a deep-sea animal traditionally studied from preserved specimens. Han Tian, the study's primary author and a doctoral researcher at Sun Yat-sen University, described the findings as 'paradigm-shifting,' noting that Scalicus engyceros is among the few fish species known to walk. The researchers observed that the searobins have distinctive barbels resembling a farmer's rake, which they use to sense and probe potential prey in seafloor sediment. Additionally, the fish's pectoral fins have evolved into flat, round plates that improve balance during walking and swimming, while their shrimp-like fin rays and tail enable explosive, jerky leaps when threatened. The study also noted that despite living in the deep sea, the fish retain some sensitivity to light, as evidenced by one fish rolling its eyes when exposed to an underwater vehicle's light. This discovery challenges previous assumptions about deep-sea fish behavior and provides new insights into the evolutionary adaptations of these unique marine creatures.

youtube.com

Deep wonder, brought to you by the deep waters of Trinidad and Tobago!

YouTube video by Schmidt Ocean Institute

youtu.be

HawkZombie Plays: O.B.O.L

YouTube video by Hawkzombie

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