Chris Mah
@echinoblog.bsky.social
The "starfish guy"(but also a little about a lot of marine invertebrates, #echinoday #echinoderms. Kaiju, comics enthusiast. Marine scientist, taxonomist, deep-sea researcher. Statements/posts made here are my own & DO NOT REPRESENT HOST organizations
Pinned
Chris Mah
@echinoblog.bsky.social
· Nov 17
New Antarctic Starfish Are Doting Parents and Vicious Predators (Published 2023)
A close examination of a collection of starfish in the Smithsonian revealed even more starfish inside those starfish.
www.nytimes.com
A recent account of my research in the NYT! by @megadarren.bsky.social ! #echinoday www.nytimes.com/2023/08/04/s...
A video about this glass sponge from the Gulf- #okeanos 2017 with narrative from collegue Dr. Chuck Messing who passed away a few years ago, good to hear his voice again, but sad to know he's gone 😢 #spongeThursday youtu.be/aFAIt3YrWTo?...
Gulf of Mexico: Life on a Glass Sponge
YouTube video by Global Foundation For Ocean Exploration
youtu.be
February 9, 2026 at 10:58 PM
A video about this glass sponge from the Gulf- #okeanos 2017 with narrative from collegue Dr. Chuck Messing who passed away a few years ago, good to hear his voice again, but sad to know he's gone 😢 #spongeThursday youtu.be/aFAIt3YrWTo?...
Reposted by Chris Mah
Can't wait for the next #MolluscMonday to post this:
This adorable chiton gets to be named by the public! Let's find it the name it deserves 😀
#biodiversity #deepsea #deepseacreatures #redlist #DeepSeaDrilling
This adorable chiton gets to be named by the public! Let's find it the name it deserves 😀
#biodiversity #deepsea #deepseacreatures #redlist #DeepSeaDrilling
𝗬𝗼𝘂𝗿 𝗰𝗵𝗮𝗻𝗰𝗲 𝘁𝗼 𝗻𝗮𝗺𝗲 𝗮 𝘀𝗽𝗲𝗰𝗶𝗲𝘀! Check out Ze Frank’s newest True Facts video and drop your name suggestion for this new chiton in the comments: youtu.be/G7HkBBJO7ZU?...
@sgn.one @bdj.pensoft.net
@sgn.one @bdj.pensoft.net
True Facts: New Species Naming Competition
YouTube video by Ze Frank
youtu.be
January 27, 2026 at 8:36 AM
Can't wait for the next #MolluscMonday to post this:
This adorable chiton gets to be named by the public! Let's find it the name it deserves 😀
#biodiversity #deepsea #deepseacreatures #redlist #DeepSeaDrilling
This adorable chiton gets to be named by the public! Let's find it the name it deserves 😀
#biodiversity #deepsea #deepseacreatures #redlist #DeepSeaDrilling
Reposted by Chris Mah
For #MolluscMonday, a cephalopod engraving from ‘Tableau Encyclopédique et Méthodique des Trois Règnes de la Nature’ published in Paris in 1791.
Coin for scale. 🦑 🐙
Coin for scale. 🦑 🐙
February 2, 2026 at 1:15 PM
For #MolluscMonday, a cephalopod engraving from ‘Tableau Encyclopédique et Méthodique des Trois Règnes de la Nature’ published in Paris in 1791.
Coin for scale. 🦑 🐙
Coin for scale. 🦑 🐙
Reposted by Chris Mah
"Caenogastropods and heterobranch gastropods from the Hettangian deposits of Luxembourg: palaeobiogeography and Early Jurassic faunal recovery in the western Tethys" by Monari et al in @thepalass.bsky.social
#MolluscMonday
onlinelibrary.wiley.com/doi/10.1002/...
#MolluscMonday
onlinelibrary.wiley.com/doi/10.1002/...
February 2, 2026 at 5:50 PM
"Caenogastropods and heterobranch gastropods from the Hettangian deposits of Luxembourg: palaeobiogeography and Early Jurassic faunal recovery in the western Tethys" by Monari et al in @thepalass.bsky.social
#MolluscMonday
onlinelibrary.wiley.com/doi/10.1002/...
#MolluscMonday
onlinelibrary.wiley.com/doi/10.1002/...
Reposted by Chris Mah
New parasitic eulimid snails in South African brittle stars! #molluscmonday #echinoday www.news.uct.ac.za/article/-202...
New genus of sea snail discovered in the Great African Seaforest
Scientists from UCT’s Department of Biological Sciences have been involved in an international research project which shows a parasitic sea snail that represents an entirely new genus.
www.news.uct.ac.za
February 6, 2026 at 9:08 PM
New parasitic eulimid snails in South African brittle stars! #molluscmonday #echinoday www.news.uct.ac.za/article/-202...
Reposted by Chris Mah
#MolluscMonday 99% of visitors to the Egyptian and Greek galleries in the British Museum will be too focused on the items displayed in the cabinets to notice the Jurassic gastropods and Cretaceous rudist bivalves in the flooring beneath.
February 9, 2026 at 7:49 AM
#MolluscMonday 99% of visitors to the Egyptian and Greek galleries in the British Museum will be too focused on the items displayed in the cabinets to notice the Jurassic gastropods and Cretaceous rudist bivalves in the flooring beneath.
SO CUTE! Lovenia elongata, a fast burrowing heart urchin which uses its spines and tube feet! #echinoday youtube.com/shorts/zp73-...
砂地のランナー / ヒラタブンブク #水中映像 #海の生き物 #最速
YouTube video by aquatic pro
youtube.com
February 9, 2026 at 7:23 PM
SO CUTE! Lovenia elongata, a fast burrowing heart urchin which uses its spines and tube feet! #echinoday youtube.com/shorts/zp73-...
Reposted by Chris Mah
new sea stars just dropped, Chris uploaded the pics in the replies
CRAZY diversity of sea stars fr NEW CALEDONIA! I describe 28 NEW SPECIES,3 NEW GENERA! #echinoday #goniasteridae #openaccess. My thanks to colleagues at the @MNHN.fr in Paris! for my many visits in order to complete this research! Will share some of my favorites herein! mapress.com/mt/article/v...
New genera, species and occurrences of Goniasteridae (Valvatida, Asteroidea) from New Caledonia
| Megataxa
mapress.com
February 9, 2026 at 4:55 PM
new sea stars just dropped, Chris uploaded the pics in the replies
CRAZY diversity of sea stars fr NEW CALEDONIA! I describe 28 NEW SPECIES,3 NEW GENERA! #echinoday #goniasteridae #openaccess. My thanks to colleagues at the @MNHN.fr in Paris! for my many visits in order to complete this research! Will share some of my favorites herein! mapress.com/mt/article/v...
New genera, species and occurrences of Goniasteridae (Valvatida, Asteroidea) from New Caledonia
| Megataxa
mapress.com
February 9, 2026 at 4:15 PM
CRAZY diversity of sea stars fr NEW CALEDONIA! I describe 28 NEW SPECIES,3 NEW GENERA! #echinoday #goniasteridae #openaccess. My thanks to colleagues at the @MNHN.fr in Paris! for my many visits in order to complete this research! Will share some of my favorites herein! mapress.com/mt/article/v...
A timely encore of this SWIMMING SEA SPIDER for #seaspiderSaturday! #okeanos #pycnogonid youtu.be/7xt-R9UM-j0?...
Gulf of Mexico: The Sea Spider Stroke
YouTube video by Global Foundation For Ocean Exploration
youtu.be
February 8, 2026 at 12:50 AM
A timely encore of this SWIMMING SEA SPIDER for #seaspiderSaturday! #okeanos #pycnogonid youtu.be/7xt-R9UM-j0?...
Reposted by Chris Mah
February 7, 2026 at 3:26 AM
Reposted by Chris Mah
Some good news
Bermuda snail thought to be extinct now thrives after a decade’s effort
Special pods at Chester zoo helped conservationists breed and release more than 100,000 greater Bermuda snails
www.theguardian.com
February 7, 2026 at 6:57 AM
Some good news
Reposted by Chris Mah
Regularly scheduled reminder:
I’m sorry, but I am not able to be interviewed for 30 minutes about my career for your homework assignment.
I may be available to zoom into your class and answer everyone’s questions at once.
I’m sorry, but I am not able to be interviewed for 30 minutes about my career for your homework assignment.
I may be available to zoom into your class and answer everyone’s questions at once.
February 6, 2026 at 9:07 PM
Regularly scheduled reminder:
I’m sorry, but I am not able to be interviewed for 30 minutes about my career for your homework assignment.
I may be available to zoom into your class and answer everyone’s questions at once.
I’m sorry, but I am not able to be interviewed for 30 minutes about my career for your homework assignment.
I may be available to zoom into your class and answer everyone’s questions at once.
New parasitic eulimid snails in South African brittle stars! #molluscmonday #echinoday www.news.uct.ac.za/article/-202...
New genus of sea snail discovered in the Great African Seaforest
Scientists from UCT’s Department of Biological Sciences have been involved in an international research project which shows a parasitic sea snail that represents an entirely new genus.
www.news.uct.ac.za
February 6, 2026 at 9:08 PM
New parasitic eulimid snails in South African brittle stars! #molluscmonday #echinoday www.news.uct.ac.za/article/-202...
Reposted by Chris Mah
A lovely find today with @geologyjohnson.bsky.social at Robin Hoods Bay.
Lots going on here in this Staithes sandstone including: scallop, oyster, and a cute little crinoid ossicle 🤩
#FossilFriday #Paleontology #Geology #Fossil
Lots going on here in this Staithes sandstone including: scallop, oyster, and a cute little crinoid ossicle 🤩
#FossilFriday #Paleontology #Geology #Fossil
February 6, 2026 at 6:01 PM
A lovely find today with @geologyjohnson.bsky.social at Robin Hoods Bay.
Lots going on here in this Staithes sandstone including: scallop, oyster, and a cute little crinoid ossicle 🤩
#FossilFriday #Paleontology #Geology #Fossil
Lots going on here in this Staithes sandstone including: scallop, oyster, and a cute little crinoid ossicle 🤩
#FossilFriday #Paleontology #Geology #Fossil
Reposted by Chris Mah
That looks like Pseudopecten equivalvis.
A lovely find today with @geologyjohnson.bsky.social at Robin Hoods Bay.
Lots going on here in this Staithes sandstone including: scallop, oyster, and a cute little crinoid ossicle 🤩
#FossilFriday #Paleontology #Geology #Fossil
Lots going on here in this Staithes sandstone including: scallop, oyster, and a cute little crinoid ossicle 🤩
#FossilFriday #Paleontology #Geology #Fossil
February 6, 2026 at 6:04 PM
That looks like Pseudopecten equivalvis.
Reposted by Chris Mah
I was talking about ctenophores last night and it just made me want to lay on a dock watching the animals go by so badly. This is the part of the winter where the length of time indoors starts to feel unbearable.
February 6, 2026 at 6:06 PM
I was talking about ctenophores last night and it just made me want to lay on a dock watching the animals go by so badly. This is the part of the winter where the length of time indoors starts to feel unbearable.
Reposted by Chris Mah
Bed of crinoid fossils from Kansas, USA. Late Cretaceous. American Museum of Natural History.
December 28, 2024 at 12:24 AM
Bed of crinoid fossils from Kansas, USA. Late Cretaceous. American Museum of Natural History.
Reposted by Chris Mah
Fossil-Quest! Texas "Best" Fossil Finds! Echinoid Phymosoma (Cretaceous), Crinoid Unknown (Cretaceous), Crab Callinectes (Pleistocene) and Gastropod Gegania antiquata (Eocene)
November 20, 2024 at 8:54 PM
Fossil-Quest! Texas "Best" Fossil Finds! Echinoid Phymosoma (Cretaceous), Crinoid Unknown (Cretaceous), Crab Callinectes (Pleistocene) and Gastropod Gegania antiquata (Eocene)
Reposted by Chris Mah
We had a great fossil walk today! Our group found beef ammonites and belemnites galore, along with pieces of crinoid, cretaceous sponge and shells, and an ichthyosaur bone. This ammonite was Daisy's favourite fossil!
We still have spaces on our upcoming fossil walks: charmouth.org/chcc/events-...
We still have spaces on our upcoming fossil walks: charmouth.org/chcc/events-...
September 20, 2025 at 12:12 PM
We had a great fossil walk today! Our group found beef ammonites and belemnites galore, along with pieces of crinoid, cretaceous sponge and shells, and an ichthyosaur bone. This ammonite was Daisy's favourite fossil!
We still have spaces on our upcoming fossil walks: charmouth.org/chcc/events-...
We still have spaces on our upcoming fossil walks: charmouth.org/chcc/events-...
Reposted by Chris Mah
Second round. Fort Worth and Mineral Wells, Texas fossil hunting. Trilobites, brachiopods, and crinoids.
#fossils #texasFossils #cretaceous
#fossils #texasFossils #cretaceous
January 22, 2026 at 5:30 AM
Second round. Fort Worth and Mineral Wells, Texas fossil hunting. Trilobites, brachiopods, and crinoids.
#fossils #texasFossils #cretaceous
#fossils #texasFossils #cretaceous
Reposted by Chris Mah
Historic specimens of the unusual #Cretaceous crinoids Marsupites and Uintacrinus @nhm-london.bsky.social made by Dr Arthur Rowe in the 1900s, including some beautiful pencil drawings. These extinct 'sea lilies' are abundant at certain levels in the #chalk making them useful for global correlation.
October 15, 2025 at 8:15 AM
Historic specimens of the unusual #Cretaceous crinoids Marsupites and Uintacrinus @nhm-london.bsky.social made by Dr Arthur Rowe in the 1900s, including some beautiful pencil drawings. These extinct 'sea lilies' are abundant at certain levels in the #chalk making them useful for global correlation.
Reposted by Chris Mah
For #FossilFriday here’s a poster I made showcasing the variety of fossils that can be found in Texas . I made a similar poster for the Lewisville public library. All are specimen I personally found, photographs my own.
#cretaceous #paleontology #ammonite #crinoid #fossils
#cretaceous #paleontology #ammonite #crinoid #fossils
August 1, 2025 at 2:45 PM
For #FossilFriday here’s a poster I made showcasing the variety of fossils that can be found in Texas . I made a similar poster for the Lewisville public library. All are specimen I personally found, photographs my own.
#cretaceous #paleontology #ammonite #crinoid #fossils
#cretaceous #paleontology #ammonite #crinoid #fossils
Reposted by Chris Mah
#FossilFriday pyritized ammonite from the Punta delle Rocchette Fm. Lower Jurassic.
February 6, 2026 at 9:41 AM
#FossilFriday pyritized ammonite from the Punta delle Rocchette Fm. Lower Jurassic.
Reposted by Chris Mah
February's fossil of the month is now on display. Found by one of our wardens during a lunchbreak wander, this slab of limestone was hiding a mass of 200-million-year old crinoid heads and tendrils all entwined and laying over each other!
#FossilFriday
(1/2)
#FossilFriday
(1/2)
February 6, 2026 at 11:54 AM
February's fossil of the month is now on display. Found by one of our wardens during a lunchbreak wander, this slab of limestone was hiding a mass of 200-million-year old crinoid heads and tendrils all entwined and laying over each other!
#FossilFriday
(1/2)
#FossilFriday
(1/2)