Chris Mah

A recent account of my research in the NYT! by @megadarren.bsky.social ! #echinoday www.nytimes.com/2023/08/04/s...

#WormWednesday Hyalinoecia onuphids (quillworms) scavenging something organic

OH CARP! that entire bottom is COVERED in tube worms! WOTTA visual! SO MUCH NOTHRIA! #wormwednesday www.inaturalist.org/observations...

Clear tube! Hyalinocecia! #wormwednesday www.inaturalist.org/observations...

ha ha. these things are great! its like walking around with your own sleeping bag! Hyalinoecia #wormwednesday www.inaturalist.org/observations...

An "action shot" of Hyalinoecia deployed from its tube! #wormwednesday from Indonesia! www.inaturalist.org/observations...

oh neat! this onuphid tube worm, genus Northria has a more sediment based tube! #wormwednesday www.inaturalist.org/observations...

An onuphid tube worm/snail huddle at 430 m on June Pea Island #okeanos I don't remember why they were doing this, but presumably feeding? #wormwednesday

An ONUPHID (similar to Hyalinoecia) moment from #okeanos at 408 m, June Pea Island.. a bunch of them huddling around this moribund squid! NOM NOM! #wormwednesday

These onuphid tube worms, Hyalinoecia have been on my radar lately! So enjoy #wormwednesday ! youtu.be/cwlsPJ9Ko1c?...

Some recent diatoms… Trieres mobiliensis OR Trieres regia Guinardia flaccida Sundstroemia pungens Rhaphoneis amphiceros Podosira sp. (species yet to be determined ) #marineplankton 🔬🦑

Welcome back to another #TrilobiteTuesday Here is Gerastos granulosos from the Middle Devonian (Eifelian) Mahder Basin of Morocco.

Sunset sand. 🌅🌊 #TidesOutTuesday

Here's something unusual: a polychaete larva with two tails? One episphere, three eyes instead of four, and two perfectly formed trunks. But alas, no mouth, so it can't feed. Its sibs have already metamorphosed. Spiralian dev biologists: how is this even possible?

oh nice! Benthic Siphonophore aka a "sea dandelion" from #Okeanos several years ago! youtu.be/u8LcByNCFcQ?...

Many mussels for #MolluscMonday 🌊🦑 #MarineLife #MolluskMonday

#MolluscMonday Pyritized specimen of the Late Jurassic ammonite Rasenia involuta from the Kimmeridge Clay of Market Rasen, Lincolnshire. On display at the wonderful Sedgwick Museum in Cambridge.

Sea cucumber-inspired gel could help heal damaged tissue in humans - @uwaterloo.ca uwaterloo.ca/news/media/s...

huh. wow. Tripneustes australiae? www.australiangeographic.com.au/nature-wildl...

A closer look at the burrowing behavior of bivalves. 🐚 It's fascinating to watch how these molluscs move beneath the sediment. youtu.be/IwXe0S-YVk4 #Mollusca #Biodiversity #bivalve #Invertebrate

The U.S. Postal Service has reduced mail pickup at some local facilities, which could affect when your ballot is postmarked. To find out whether your ZIP code is affected, use our lookup tool: www.propublica.org/article/mail...

Three days after the August primary, election workers in one Washington county went to check for late mail-in ballots. They expected no more than a few dozen. Instead, there were more than 500 — each a vote that wouldn’t count.

Just Published 📰iNaturalist observations drastically expand knowledge of naticid predation in the northwest Atlantic ✒️Clements 🔗 https://doi.org/10.1139/cjz-2026-0069 📷 Fig. 2: bivalve (A–F) and gastropod (G–L) prey species from iNaturalist

I found these at an orangutan sanctuary and I’m not ashamed to say I spent about three minutes looking at the ape and the rest of my time watching these glorious myriapods trundle about

Anemone, Ophiuroid on its tippies, shrimp, bryozoan & squat lobster, Halosaur, sea cucumber, Psychropotes? @schmidtocean.bsky.social dive 981 #samplinggap #MarineLife

SIPHONOPHORES! via @mbarinews.bsky.social youtu.be/Lk3-6-lcSRk?...

Source: buff.ly/chZ6hth

Anemone, staring at the transparent rear end of a sea cucumber, Elpidiidae, Homolid 🦀 w/ anemone, carnivorous sponge @schmidtocean.bsky.social dive 981 #samplinggap #MarineLife

#OKEANOS 2015 Remember when they found the LARGEST SPONGE KNOWN?? the size of a small car! #SPONGETHURSDAY youtu.be/7q1DQIZzgwc?...

A fallen glass sponge showing off its holdfast! yes. glass fibers! very much like fiber optic cable! #spongeThursday #okeanos 3115 m east basin seamount, American Samoa

Another incredibly elongate deep-sea stalked sponge! at 3093 m, east basin seamount, American Samoa #spongeThursday #Okeanos

Minute calcareous sponge with faint membrane in front of the osculum from the mediolittoral of the Northern Adriatic. Which genus? #SpongeThursday, #Invertebrates

Minute calcareous sponge with faint membrane in front of the osculum from the mediolittoral of the Northern Adriatic. Which genus? #SpongeThursday, #Invertebrates

Young sponge in a plankton sample from the northern Adriatic Sea. Reminds hoplitomella larvae in local waters; perhaps the forthcoming stage, still floating? #SpongeThursday #Plankton #Invertebrates

Anything calcareous sponges and humans have in common? Both use carbonic anhydrase for biocalcite production, acting as building block for calcareous sponge spicules and bioseeds during mammalian hydroxyapatite formation. Purse sponge from the N Adriatic Sea. #spongeThursday

An amazing #deepsea Saccocalyx glass sponge! observed by #Okeanos from Salmon Bank in the North Pacific #spongeThursday Easily 1 to 2 m tall!

An ophiacanthid? brittle star hanging on to its glass sponge friend! Possibly taking advantage of all those sharp needle-like spicules! #spongeThusday #Okeanos 2016 Salmon Bank in the North Pacific!

OH NEAT! A dead euplectellid glass sponge makes a COOL tunnel o' brittle stars and a hanging point for this feather star! SPONGE TUNNEL for #SPONGETHURSDAY from Salmon Bank #okeanos 2016

Kinorhyncha (Echinoderes sp.) from the littoral sediment of the North Adriatic #WormWednesday

Kinorhyncha (Echinoderes sp.) from the littoral sediment of the North Adriatic #WormWednesday

Mitraria larvae from the coastal waters of Istria, January 2018. Peacock of the Adriatic Sea! #WormWednesday #Plankton #Invertebrate

Mitraria larvae from the coastal waters of Istria, January 2018. Peacock of the Adriatic Sea! #WormWednesday #Plankton #Invertebrate

Acoela (maybe Isodiametra pulchra?) from the #meiofauna of the coastal waters of Istria, the northern part of the #AdriaticSea for #WormWednesday #marinebiodiversity #invertebrates

Unidentified Polycladida larvae from the plankton of the North Adria. Four longer and two shorter lobes well visible, plus two more are hidden. Probably Müller’s larvae. #WormWednesday #plankton #invertebrates

Soft bodied and translucent arrow worms are in fact dangerous hunters of the #plankton with double armour: scary chitinous grasping spines serve hunting, while invisible bacterial symbionts may produce deadly tetrodotoxin, paralyzing prey. Northern Adriatic Sea, #WormWednesday

Soft bodied and translucent arrow worms are in fact dangerous hunters of the #plankton with double armour: scary chitinous grasping spines serve hunting, while invisible bacterial symbionts may produce deadly tetrodotoxin, paralyzing prey. Northern Adriatic Sea, #WormWednesday

An abundant polychaete worm from the #meiobenthos of the northern Adriatic Sea. Any closer affiliation? #WormWednesday

Polyclads are marine turbellarians with biphasic life cycle. Ciliated larvae with different number of lobes are often found in coastal #plankton. Müller's larva and Götte’s larva from the northern Adriatic Sea. #WormWednesday

Aging out! Late stage, planktotrophic spionid larva from the #plankton of the northern Adriatic Sea. #WormWednesday, #Invertebrates