Chris Mah

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

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

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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

Gordian knot - or not? Polygordius or a relative from the #macrozoobenthos from the northern Adriatic Sea. #WormWednesday

A monostiliferan larva (Hoplonemertea) from the coastal #plankton of the northern Adriatic Sea. At rest its stylet lies at the bottom end of the proboscis (in the middle). #Invertebrates #WormWednesday

Two-in –one – Ophiuroid with an unknown epibiont: a Myzostomida? Juvenile Amphipholis squamata may also appear on the parent, but looks different. Northern Adriatic Sea benthos, #Invertebrates, #WormWednesday

Underwater fireworks – mitraria larva of Oweniidae polychaete worms with long, glittering bristles from the coastal #plankton of the northern Adriatic Sea, one of the most beautiful floating marine organisms! #WormWednesday

#WormWednesday traditionally referred to as 'Filograna avita', this calcareous worm commonly encrusted shells of inoceramid #bivalve molluscs on the chalk seafloor during the early Turonian (~94 million years ago). This association is found throughout southern 🇬🇧 and northern 🇫🇷 at the same horizon.

#WormWednesday Terebellides? They all look the same don't they, all 94 species? Not if you look closely, or if you use molecules. Nice photos of two new species from the White Sea. Grosse et al. doi.org/10.1080/1745...

Interesting lines. They just keep going. Coral maybe Alternatipathes, anemone, tube worm, polynoid, cusk eel @schmidtocean.bsky.social dive 980 #samplinggap #MarineLife

The first captive bred males of Euryurus orestes and Euryurus mcclurkini appeared today! These might be photos of the same individual except, as usual for millipedes, differences in the genitalia, significant enough that prior to molecular revision E. mcclurkini occupied a different genus, Auturus.

Shipwrecks can become thriving reefs, but may contain hidden toxic time bombs - @uk.theconversation.com theconversation.com/shipwrecks-c...