C. Chen @ Jamsteeeec
@squamiferum.bsky.social
Deep-sea biologist / Malacologist @JAMSTEC and @Senckenberg. Chemosynthesis-based ecosystems. 海洋生物学者・深海・軟体動物・化学合成生態系。
Website: https://squamiferum.net
See the collection: https://www.conchology.be/?t=92
Website: https://squamiferum.net
See the collection: https://www.conchology.be/?t=92
Pinned
[New Paper] Reveals an unexpectedly high animal diversity at Nankai Trough cold seeps: 80 species incl. >10 new discoveries!
OPEN ACCESS in @esajournals.bsky.social Ecosphere:
doi.org/10.1002/ecs2...
This is the 1st paper from the June 2025 JAMSTEC x @oceancensus.bsky.social "SHINKAI" cruise.
OPEN ACCESS in @esajournals.bsky.social Ecosphere:
doi.org/10.1002/ecs2...
This is the 1st paper from the June 2025 JAMSTEC x @oceancensus.bsky.social "SHINKAI" cruise.
[New Preprint] 3 days ago, we had a dive at Quaker Seamount -- and today we report the first results! We discovered a serpentinite-hosted seep ecosystem there + the first visible discharge of geofluids.
Read for FREE: doi.org/10.64898/202...
Dive video:
www.youtube.com/watch?v=EMwp...
Read for FREE: doi.org/10.64898/202...
Dive video:
www.youtube.com/watch?v=EMwp...
December 27, 2025 at 4:48 AM
[New Preprint] 3 days ago, we had a dive at Quaker Seamount -- and today we report the first results! We discovered a serpentinite-hosted seep ecosystem there + the first visible discharge of geofluids.
Read for FREE: doi.org/10.64898/202...
Dive video:
www.youtube.com/watch?v=EMwp...
Read for FREE: doi.org/10.64898/202...
Dive video:
www.youtube.com/watch?v=EMwp...
We will live-stream a dive at the NW Rota Volcano, Mariana Arc in about an hour! This site is famous for being volcanically and hydrothermally very active.
www.youtube.com/live/hIb3QTz...
www.youtube.com/live/hIb3QTz...
【LIVE】JAMSTEC KM-ROV Dive #359
深海の生物調査映像をライブ配信！
ROV(無人探査機)による映像をお楽しみください(音声の配信はございません)。
Live deep-sea exploration stream!
Watch amazing deep-sea creatures through footage from an ROV (remotely operated vehicle).
Video only — no au...
www.youtube.com
December 25, 2025 at 11:16 PM
We will live-stream a dive at the NW Rota Volcano, Mariana Arc in about an hour! This site is famous for being volcanically and hydrothermally very active.
www.youtube.com/live/hIb3QTz...
www.youtube.com/live/hIb3QTz...
Reposted by C. Chen @ Jamsteeeec
Wow! Quite a weird looking sea cucumber! and that's sayin' something for deep-sea sea cucumbers! #echinoday
[New Paper] names Acanthotrochus verruciosseous, a new species of namako (holothurian) from >5000 m deep in the Aleutian Trench! We also present a high-resolution CT scan of the whole body, showing the ossicle distribution.
LINK to the paper in Bulletin of Marine Science: doi.org/10.5343/bms....
LINK to the paper in Bulletin of Marine Science: doi.org/10.5343/bms....
December 25, 2025 at 5:07 PM
Wow! Quite a weird looking sea cucumber! and that's sayin' something for deep-sea sea cucumbers! #echinoday
Season’s Greetings, and all the best for a fantastic New Year!
良いクリスマスと新年をお迎えください。来年もどうぞよろしくお願い申し上げます。
良いクリスマスと新年をお迎えください。来年もどうぞよろしくお願い申し上げます。
December 24, 2025 at 6:43 PM
Season’s Greetings, and all the best for a fantastic New Year!
良いクリスマスと新年をお迎えください。来年もどうぞよろしくお願い申し上げます。
良いクリスマスと新年をお迎えください。来年もどうぞよろしくお願い申し上げます。
[DIVE LIVE STREAMING] We plan to stream a ROV dive at the Quaker serpentinite seamount on the Mariana Forearc tomorrow, live from R/V KAIMEI!
Dec 23 08:00-17:00 (Japan Time), on the @JAMSTEC_PR
YouTube channel:
youtube.com/live/Nt_8P_m...
*If cancelled, will be posponed to Dec 24.
Dec 23 08:00-17:00 (Japan Time), on the @JAMSTEC_PR
YouTube channel:
youtube.com/live/Nt_8P_m...
*If cancelled, will be posponed to Dec 24.
【LIVE】JAMSTEC KM-ROV Dive #356
YouTube video by JAMSTEC 海洋研究開発機構
youtube.com
December 22, 2025 at 10:23 AM
[DIVE LIVE STREAMING] We plan to stream a ROV dive at the Quaker serpentinite seamount on the Mariana Forearc tomorrow, live from R/V KAIMEI!
Dec 23 08:00-17:00 (Japan Time), on the @JAMSTEC_PR
YouTube channel:
youtube.com/live/Nt_8P_m...
*If cancelled, will be posponed to Dec 24.
Dec 23 08:00-17:00 (Japan Time), on the @JAMSTEC_PR
YouTube channel:
youtube.com/live/Nt_8P_m...
*If cancelled, will be posponed to Dec 24.
[New Paper] names Acanthotrochus verruciosseous, a new species of namako (holothurian) from >5000 m deep in the Aleutian Trench! We also present a high-resolution CT scan of the whole body, showing the ossicle distribution.
LINK to the paper in Bulletin of Marine Science: doi.org/10.5343/bms....
LINK to the paper in Bulletin of Marine Science: doi.org/10.5343/bms....
December 16, 2025 at 7:54 PM
[New Paper] names Acanthotrochus verruciosseous, a new species of namako (holothurian) from >5000 m deep in the Aleutian Trench! We also present a high-resolution CT scan of the whole body, showing the ossicle distribution.
LINK to the paper in Bulletin of Marine Science: doi.org/10.5343/bms....
LINK to the paper in Bulletin of Marine Science: doi.org/10.5343/bms....
[New Paper] We identified the mineral coatings on deep-sea hydrothermal vent snails, linking their chemical composition to geological background and distance from active fluid orifices!
Find out more here in our Scientific Reports @springernature.com OPEN ACCESS paper: doi.org/10.1038/s415...
Find out more here in our Scientific Reports @springernature.com OPEN ACCESS paper: doi.org/10.1038/s415...
December 4, 2025 at 4:17 AM
[New Paper] We identified the mineral coatings on deep-sea hydrothermal vent snails, linking their chemical composition to geological background and distance from active fluid orifices!
Find out more here in our Scientific Reports @springernature.com OPEN ACCESS paper: doi.org/10.1038/s415...
Find out more here in our Scientific Reports @springernature.com OPEN ACCESS paper: doi.org/10.1038/s415...
Reposted by C. Chen @ Jamsteeeec
New deep sea ecology research in our #OpenAccess journal "Ecosphere"!⬇️
[New Paper] Reveals an unexpectedly high animal diversity at Nankai Trough cold seeps: 80 species incl. >10 new discoveries!
OPEN ACCESS in @esajournals.bsky.social Ecosphere:
doi.org/10.1002/ecs2...
This is the 1st paper from the June 2025 JAMSTEC x @oceancensus.bsky.social "SHINKAI" cruise.
OPEN ACCESS in @esajournals.bsky.social Ecosphere:
doi.org/10.1002/ecs2...
This is the 1st paper from the June 2025 JAMSTEC x @oceancensus.bsky.social "SHINKAI" cruise.
November 19, 2025 at 2:20 PM
New deep sea ecology research in our #OpenAccess journal "Ecosphere"!⬇️
[New Paper] Reveals an unexpectedly high animal diversity at Nankai Trough cold seeps: 80 species incl. >10 new discoveries!
OPEN ACCESS in @esajournals.bsky.social Ecosphere:
doi.org/10.1002/ecs2...
This is the 1st paper from the June 2025 JAMSTEC x @oceancensus.bsky.social "SHINKAI" cruise.
OPEN ACCESS in @esajournals.bsky.social Ecosphere:
doi.org/10.1002/ecs2...
This is the 1st paper from the June 2025 JAMSTEC x @oceancensus.bsky.social "SHINKAI" cruise.
November 19, 2025 at 1:57 PM
[New Paper] Reveals an unexpectedly high animal diversity at Nankai Trough cold seeps: 80 species incl. >10 new discoveries!
OPEN ACCESS in @esajournals.bsky.social Ecosphere:
doi.org/10.1002/ecs2...
This is the 1st paper from the June 2025 JAMSTEC x @oceancensus.bsky.social "SHINKAI" cruise.
OPEN ACCESS in @esajournals.bsky.social Ecosphere:
doi.org/10.1002/ecs2...
This is the 1st paper from the June 2025 JAMSTEC x @oceancensus.bsky.social "SHINKAI" cruise.
[New Paper] Two shrimp species, Rimicaris loihi and R. cambonae, live side by side at hydrothermal vents — yet remain genetically distinct. Our genomic data and decadal sampling reveal insights on their demography and speciation!
Out now in Molecular Ecology, OPEN ACCESS: doi.org/10.1111/mec....
Out now in Molecular Ecology, OPEN ACCESS: doi.org/10.1111/mec....
October 11, 2025 at 12:14 PM
[New Paper] Two shrimp species, Rimicaris loihi and R. cambonae, live side by side at hydrothermal vents — yet remain genetically distinct. Our genomic data and decadal sampling reveal insights on their demography and speciation!
Out now in Molecular Ecology, OPEN ACCESS: doi.org/10.1111/mec....
Out now in Molecular Ecology, OPEN ACCESS: doi.org/10.1111/mec....
[New Paper] names Chaetoderma naga, a gigantic (>13 cm) new worm-mollusc from a cold seep! Like its sister-species C. shenloong, it probably relies on endosymbiotic bacteria for energy. We named it after Nāga, a snake-god from Asian mythologies!
Out now in Moll. Res., LINK: doi.org/10.1080/1323...
Out now in Moll. Res., LINK: doi.org/10.1080/1323...
October 10, 2025 at 4:20 PM
[New Paper] names Chaetoderma naga, a gigantic (>13 cm) new worm-mollusc from a cold seep! Like its sister-species C. shenloong, it probably relies on endosymbiotic bacteria for energy. We named it after Nāga, a snake-god from Asian mythologies!
Out now in Moll. Res., LINK: doi.org/10.1080/1323...
Out now in Moll. Res., LINK: doi.org/10.1080/1323...
[New Paper] in Zootaxa names new genus Lobatoradarea in the amphipod family Calliopiidae, with 10 new species found across a wide range of marine habitats from shallow subtidal waters to a deep-sea hydrothermal vent!
Link to the paper: mapress.com/zt/article/v...
Link to the paper: mapress.com/zt/article/v...
October 2, 2025 at 1:02 AM
[New Paper] in Zootaxa names new genus Lobatoradarea in the amphipod family Calliopiidae, with 10 new species found across a wide range of marine habitats from shallow subtidal waters to a deep-sea hydrothermal vent!
Link to the paper: mapress.com/zt/article/v...
Link to the paper: mapress.com/zt/article/v...
We disembarked from research vessel R/V YOKOSUKA in #Chichijima Island, #Bonin ( #Ogasawara ) Islands! The only way back to the main island of Japan is by a biweekly 24-hours ferry trip, so we got a couple days to see the islands!
October 1, 2025 at 1:42 PM
We disembarked from research vessel R/V YOKOSUKA in #Chichijima Island, #Bonin ( #Ogasawara ) Islands! The only way back to the main island of Japan is by a biweekly 24-hours ferry trip, so we got a couple days to see the islands!
[New Paper] Names Pyropelta artemis, a new deep-sea limpet from the Off Hatsushima seep in Japan! This species 'shape-shifts' its shell to fit the substrate shape, which we likened to the moon's waxing and waning.
Just out in Contributions to Zoology, OPEN ACCESS: brill.com/view/journal...
Just out in Contributions to Zoology, OPEN ACCESS: brill.com/view/journal...
September 27, 2025 at 6:46 AM
[New Paper] Names Pyropelta artemis, a new deep-sea limpet from the Off Hatsushima seep in Japan! This species 'shape-shifts' its shell to fit the substrate shape, which we likened to the moon's waxing and waning.
Just out in Contributions to Zoology, OPEN ACCESS: brill.com/view/journal...
Just out in Contributions to Zoology, OPEN ACCESS: brill.com/view/journal...
Rare shots of JAMSTEC deep-sea research vessels: recovering HOV SHINKAI 6500 with the drilling vessel CHIKYU in the background!
Suruga Bay, Japan.
Suruga Bay, Japan.
September 26, 2025 at 1:09 AM
Rare shots of JAMSTEC deep-sea research vessels: recovering HOV SHINKAI 6500 with the drilling vessel CHIKYU in the background!
Suruga Bay, Japan.
Suruga Bay, Japan.
Reposted by C. Chen @ Jamsteeeec
NEW #DEEPSEA SNAIL WITH HARD SCALES! #molluscmonday
[New Paper] We found a SECOND SNAIL with HARD SCALES on the foot -- Ifremeria nautilei lives in deep-sea hot vents and makes chitinous scales not by secretion but by cell differentiation, like our own skin!
@royalsocietypublishing.org Proceedings B, OPEN ACCESS: doi.org/10.1098/rspb...
@royalsocietypublishing.org Proceedings B, OPEN ACCESS: doi.org/10.1098/rspb...
September 1, 2025 at 2:39 PM
NEW #DEEPSEA SNAIL WITH HARD SCALES! #molluscmonday
[New Paper] We found a SECOND SNAIL with HARD SCALES on the foot -- Ifremeria nautilei lives in deep-sea hot vents and makes chitinous scales not by secretion but by cell differentiation, like our own skin!
@royalsocietypublishing.org Proceedings B, OPEN ACCESS: doi.org/10.1098/rspb...
@royalsocietypublishing.org Proceedings B, OPEN ACCESS: doi.org/10.1098/rspb...
August 27, 2025 at 4:08 AM
[New Paper] We found a SECOND SNAIL with HARD SCALES on the foot -- Ifremeria nautilei lives in deep-sea hot vents and makes chitinous scales not by secretion but by cell differentiation, like our own skin!
@royalsocietypublishing.org Proceedings B, OPEN ACCESS: doi.org/10.1098/rspb...
@royalsocietypublishing.org Proceedings B, OPEN ACCESS: doi.org/10.1098/rspb...
Reposted by C. Chen @ Jamsteeeec
This article in BBC Wildlife outlines the discovery of a 'giant' limpet discovered 5,922m below the Pacific, described by @squamiferum.bsky.social in @zse.pensoft.net.
www.discoverwildlife.com/animal-facts...
www.discoverwildlife.com/animal-facts...
Deep-sea submersible discovers 'giant' animal 5,922m down in Pacific abyss | Discover Wildlife
The creature was found during a deep-sea expedition 500km south-east of Japan.
www.discoverwildlife.com
July 28, 2025 at 8:23 AM
This article in BBC Wildlife outlines the discovery of a 'giant' limpet discovered 5,922m below the Pacific, described by @squamiferum.bsky.social in @zse.pensoft.net.
www.discoverwildlife.com/animal-facts...
www.discoverwildlife.com/animal-facts...
Reposted by C. Chen @ Jamsteeeec
JAMSTECのしんかい6500の調査で、新種の巨大カサガイBathylepeta wadatsumiを発見
今までの同属の3 cmを上回る殻長40.5 mmという巨大さから漫画ONE PIECEに出てくる大入道ワダツミと日本神話の海神からwadatsumiと命名
謝辞や参考文献にONE PIECE魚人編が引用されています
【原著論文、画像引用元 (CC BY 4.0)】
zse.pensoft.net/article/1562...
今までの同属の3 cmを上回る殻長40.5 mmという巨大さから漫画ONE PIECEに出てくる大入道ワダツミと日本神話の海神からwadatsumiと命名
謝辞や参考文献にONE PIECE魚人編が引用されています
【原著論文、画像引用元 (CC BY 4.0)】
zse.pensoft.net/article/1562...
July 26, 2025 at 7:51 AM
JAMSTECのしんかい6500の調査で、新種の巨大カサガイBathylepeta wadatsumiを発見
今までの同属の3 cmを上回る殻長40.5 mmという巨大さから漫画ONE PIECEに出てくる大入道ワダツミと日本神話の海神からwadatsumiと命名
謝辞や参考文献にONE PIECE魚人編が引用されています
【原著論文、画像引用元 (CC BY 4.0)】
zse.pensoft.net/article/1562...
今までの同属の3 cmを上回る殻長40.5 mmという巨大さから漫画ONE PIECEに出てくる大入道ワダツミと日本神話の海神からwadatsumiと命名
謝辞や参考文献にONE PIECE魚人編が引用されています
【原著論文、画像引用元 (CC BY 4.0)】
zse.pensoft.net/article/1562...
[New Paper] in @zse.pensoft.net names Bathylepeta wadatsumi, the world’s DEEPEST true limpet from 6 km deep! Giant sized (4 cm) for this depth, we named it after the god of sea in Japan & also the Large Monk “Wadatsumi” from the manga series ONE PIECE!
OPEN ACCESS: doi.org/10.3897/zse....
OPEN ACCESS: doi.org/10.3897/zse....
July 25, 2025 at 1:15 AM
[New Paper] in @zse.pensoft.net names Bathylepeta wadatsumi, the world’s DEEPEST true limpet from 6 km deep! Giant sized (4 cm) for this depth, we named it after the god of sea in Japan & also the Large Monk “Wadatsumi” from the manga series ONE PIECE!
OPEN ACCESS: doi.org/10.3897/zse....
OPEN ACCESS: doi.org/10.3897/zse....
Reposted by C. Chen @ Jamsteeeec
A new species of deep-sea limpet, discovered 6 km beneath the northwestern Pacific, has beeen named after a #ONEPIECE character.
Find out why on the @pensoft.net blog: blog.pensoft.net/2025/07/24/n...
Find out why on the @pensoft.net blog: blog.pensoft.net/2025/07/24/n...
New deep-sea species named after ONE PIECE character
Found 6 km beneath the Pacific, the limpet's unusually large size inspired its name.
blog.pensoft.net
July 24, 2025 at 2:09 PM
A new species of deep-sea limpet, discovered 6 km beneath the northwestern Pacific, has beeen named after a #ONEPIECE character.
Find out why on the @pensoft.net blog: blog.pensoft.net/2025/07/24/n...
Find out why on the @pensoft.net blog: blog.pensoft.net/2025/07/24/n...
[New Paper] in European J of Taxonomy names 1 new genus and 3 new species of XENOPHYOPHORES -- giant single-celled foraminifera! We integrate in situ imagery, dissection, SEM, micro-CT, and molecular phylogeny for unprecedentedly detailed descriptions for xenos.
OPEN ACCESS: doi.org/10.5852/ejt....
OPEN ACCESS: doi.org/10.5852/ejt....
July 24, 2025 at 7:19 AM
[New Paper] in European J of Taxonomy names 1 new genus and 3 new species of XENOPHYOPHORES -- giant single-celled foraminifera! We integrate in situ imagery, dissection, SEM, micro-CT, and molecular phylogeny for unprecedentedly detailed descriptions for xenos.
OPEN ACCESS: doi.org/10.5852/ejt....
OPEN ACCESS: doi.org/10.5852/ejt....
[New Paper] Reveals 4 distinct metapopulations in the hot vent mussel Bathymodiolus septemdierum found across the Indo-W Pacific! With implications for conservation in the face of upcoming deep-sea mining.
Out now in Journal of Biogeography, OPEN ACCESS: doi.org/10.1111/jbi....
Out now in Journal of Biogeography, OPEN ACCESS: doi.org/10.1111/jbi....
July 19, 2025 at 11:16 AM
[New Paper] Reveals 4 distinct metapopulations in the hot vent mussel Bathymodiolus septemdierum found across the Indo-W Pacific! With implications for conservation in the face of upcoming deep-sea mining.
Out now in Journal of Biogeography, OPEN ACCESS: doi.org/10.1111/jbi....
Out now in Journal of Biogeography, OPEN ACCESS: doi.org/10.1111/jbi....
[New Paper] reporting 8 distinct mollusc eggs from abyssal and hadal depths of Aleutian Trench is now out in Progress in Oceanography! With a potential Dumbo Octopus egg + at least 5 snail eggs!
OPEN ACCESS: www.sciencedirect.com/science/arti...
With @sigwartae.bsky.social @oceanspecies.bsky.social
OPEN ACCESS: www.sciencedirect.com/science/arti...
With @sigwartae.bsky.social @oceanspecies.bsky.social
July 13, 2025 at 4:53 PM
[New Paper] reporting 8 distinct mollusc eggs from abyssal and hadal depths of Aleutian Trench is now out in Progress in Oceanography! With a potential Dumbo Octopus egg + at least 5 snail eggs!
OPEN ACCESS: www.sciencedirect.com/science/arti...
With @sigwartae.bsky.social @oceanspecies.bsky.social
OPEN ACCESS: www.sciencedirect.com/science/arti...
With @sigwartae.bsky.social @oceanspecies.bsky.social
[New Paper] Uses phylogenomics to resolve how deep-sea symbiotic vesicomyid clams evolved to conquer the abyss; revising some the genus-level taxonomy along the way!
Just out in the journal Cladistics, read for FREE here: onlinelibrary.wiley.com/share/author...
Just out in the journal Cladistics, read for FREE here: onlinelibrary.wiley.com/share/author...
June 24, 2025 at 9:04 AM
[New Paper] Uses phylogenomics to resolve how deep-sea symbiotic vesicomyid clams evolved to conquer the abyss; revising some the genus-level taxonomy along the way!
Just out in the journal Cladistics, read for FREE here: onlinelibrary.wiley.com/share/author...
Just out in the journal Cladistics, read for FREE here: onlinelibrary.wiley.com/share/author...