Jo Wolfe, PhD
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jopabinia.bsky.social
Jo Wolfe, PhD
@jopabinia.bsky.social
16K followers 2.9K following 15K posts
Why things evolve into crabs. Evolutionary biologist (species alive today AND fossils, and how to study them together). Canadian at UCSB and Harvard (she/her)

My science: https://scholar.google.com/citations?user=CKqoVjEAAAAJ&hl=en
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jopabinia.bsky.social
Jo Wolfe, PhD @jopabinia.bsky.social · Aug 1
Our paper on convergent evolution of land crabs is out in its final final form. The journal didn't pick my image as the cover, so I'm sharing it here because it must be seen!

academic.oup.com/sysbio/artic...

🦀🦑🧪
Circular timetree of crabs with pie slices colored by superfamily (Figure 2 in the paper). Simplified version with no text/labels. Line drawings of crabs arranged around the perimeter like a zodiac, with colors matching the superfamily pie slice. Figure by me, drawings by Harrison Mancke and Javi Luque
jopabinia.bsky.social
#CRUSTMAS 😍
ketrinadrawsalot.bsky.social KetrinaDrawsALot @ketrinadrawsalot.bsky.social · 9h
Deep-Sea-cember: The reason for the season is to be cozy at home 🦐🧽
#deepseadecember #deepseacember #deepsea #glasssponge #shrimp #venusflowerbasket #art #cozy
Two shrimp holding claws inside a Venus's flower basket (a white glass sponge)
December 7, 2025 at 3:36 AM
Reposted by Jo Wolfe, PhD
elizabethbeston.bsky.social
You beautiful, slinky worm, you! A Xenacoela - I don’t know much about these guys, but I think this one is gorgeous! Thanks @microbe_guru for the ID.
#marineplankton 🦑
December 6, 2025 at 10:28 PM
Reposted by Jo Wolfe, PhD
physgal.bsky.social
36 years ago today, 14 women, most of whom were studying engineering, were killed by an anti-feminist gun man at École Polytechnique in Montreal. I was a young graduate student studying physics at the time and I will never forget. #MontrealMassacre #NeverForget 🧪 👩‍🔬 ⚛️ 🎢 #AcademicSky 🇨🇦
Photos of the 14 victims of the Montreal massacre: Geneviève Bergeron, Hélène Colgan, Nathalie Croteau, Barbara Daigneault, Anne-Marie Edward, Maud Haviernick, Barbara Klucznik-Widajewicz, Maryse Laganière, Maryse Leclair, Anne-Marie Lemay, Sonia Pelletier, Michèle Richard, Annie St-Arneault and Annie Turcotte and the rooms where they were killed.
December 6, 2025 at 7:02 PM
Reposted by Jo Wolfe, PhD
julieslalonde.bsky.social
Today is Canada's National Day of Action & Remembrance on Violence against Women. It marks the day in 1989 when 14 women at Polytechnique in Montreal were murdered by an "incel" (Proving that shit has a new name but is an old problem.)

There are vigils across the country today. Please attend one.
December 6, 2025 at 2:52 PM
Reposted by Jo Wolfe, PhD
minibubbly.bsky.social
In remembrance

#Montreal to honour 14 victims of Polytechnique massacre at ceremony #Dec61989

Representatives from all 3 levels of government expected to be in attendance

www.cbc.ca/news/canada/...
Montreal to honour 14 victims of Polytechnique massacre at ceremony | CBC News
A total of 14 women were murdered in the mass shooting on Dec. 6, 1989. Thirteen others were injured in the attack.
www.cbc.ca
December 6, 2025 at 1:18 PM
Reposted by Jo Wolfe, PhD
skinks-and-such.bsky.social
Porcelain crab on an anemone

#photo #photography #scuba #dive #crab #crustmas
December 6, 2025 at 8:10 PM
Reposted by Jo Wolfe, PhD
johnwares.bsky.social
Rehderella belyaevi - unusual fused opercular plates, cobalt mantle tissue, likely a cryptic barnacle species opportunity for #crustmas academic.oup.com/jcb/article-...
Barnacles in a petri dish
December 6, 2025 at 8:24 PM
jopabinia.bsky.social
That's what the #Crustmas hashtag was born for

And the crab feed in general
bsky.app/profile/did:...
urbanhymnal.bsky.social Urbanhymnal @urbanhymnal.bsky.social · 14h
I have a neighbor who only has one Christmas decoration in their yard and it’s this. It’s all of like three feet tall and I am delighted every time I see it.

Crab is the true reason for the season.
An inflatable crab decoration. The crab is about three feet tall and bright red. In one of its claws is a sprig of holly.
December 6, 2025 at 9:26 PM
jopabinia.bsky.social
Land Daphnia like crustaceans just like how there's land ostracods, land crabs, land isopods, and obviously insects #Crustmas
mossworm.bsky.social mossworm.bsky.social @mossworm.bsky.social · 1d
"The Non-swimming Chydorid Cladocera of Wet Forests, with
Descriptions of a New Genus and Two New Species" Frey 1980. what do you mean they just ooze around the world
"This cladoceran can’t swim, but it can climb trees! It never leaves contact with the substrate, even when sufficient water is present, as in the culture vessels. Here it crawls over the bottom and assiduously crawls over or through the detritus, chiefly by the action of the trunk limbs with occasional assistance from the postabdomen. The antennae seem to function more as balancing structures, like halteres, in that when the animal is erect on a horizontal surface, such as the bottom of a petri dish, the antennae vibrate rapidly without seeming to contribute in any way to the forward movement. The animal moves slowly and deliberately. Even when undisturbed it undergoes long quiescent periods, sometimes with no movement of any of the trunk limbs. Disturbance, such as from touching with a needle, results in cessation of all activity. I n this possum-like condition live animals can be removed easily from cultures with an ordinary tungsten loop." drawing of Bryospilus repens terrestrial water flea. It is very round and has one eye
December 6, 2025 at 9:23 PM
Reposted by Jo Wolfe, PhD
davidho.bsky.social
PSA: Kīlauea here in Hawaiʻi is doing its thing and you want to see it.
[V3cam] Kīlauea volcano, Hawaii (south Halemaʻumaʻu crater)
YouTube video by USGS
www.youtube.com
December 6, 2025 at 7:27 PM
Reposted by Jo Wolfe, PhD
davidho.bsky.social
Deep sea mining is very bad for deep sea ecosystems.
What Scientists Found When a Deep Sea Mining Company Invited Them In
www.nytimes.com
December 6, 2025 at 6:26 PM
Reposted by Jo Wolfe, PhD
brackenlab.bsky.social
Is #SeastarSaturday a thing? 🌊⭐️ After losing so many of these important predators along the west coast of North America a decade ago, seeing their return to our rocky shores always makes me happy. 🤩 #MarineLife #Invertebrate 🦑
An orange “ochre” star (*Pisaster ochraceus*) feeds in a mussel bed on a Southern California rocky reef.
December 6, 2025 at 6:52 PM
Reposted by Jo Wolfe, PhD
echinoblog.bsky.social
Years ago during EX1706 #Okeanos on my tour as Biolead while we were parked in Honolulu harbor, I spied these cute little grapsid craps while were docked! Not sure which one, Grapsus? #crustmas
Grapsid crab with dark purple and black legs walking on orange float and seaweed Grapsid crab with dark purple and black legs walking on orange float and seaweed
December 6, 2025 at 6:26 PM
Reposted by Jo Wolfe, PhD
spidermax3000.bsky.social
Happy #crustmas Saturday
Wood louse - order: Isopoda
(Shot near Cincinnati 4-13-24) 🪲🪳🦀 #photography #macrophotography #wildlifephotography #wildlife #nature #animal #invertebrate #crustacean #isopod #bugsky
A wild isopod on a mossy wet rock
December 6, 2025 at 6:17 PM
Reposted by Jo Wolfe, PhD
jopabinia.bsky.social
This looks like Carcinus maenas or similar, yes close enough to a real species (in shape, obviously not color!) #Crustmas

I like the detail of the artist reflected in the carapace
dimitriforero.bsky.social Dimitri Forero @dimitriforero.bsky.social · 16h
Nice looking crab graffiti found in the old Las Peñas neighborhood, Guayaquil, Ecuador. @jopabinia.bsky.social might tell us if it is ok or if it is just a wild dream.
A crab graffiti found in Guayaquil, Ecuador
December 6, 2025 at 4:21 PM
Reposted by Jo Wolfe, PhD
xenomatt.bsky.social
Salps + passengers, from a blackwater dive in Balayan Bay, Anilao. Not sure what the hitch-hikers are (amphipods?) but I think they qualify for #Crustmas

#MarineLife #Invertebrates 🌿
Two translucent salps that are part of a chain; their orange digenstive systems are prominent. One of them has two other animals on it - a pale, opaque rounded one, and a longer, thinner one with prominent eyes. #UnderwaterPhotography #MacroPhotography #Wildlife
December 6, 2025 at 4:33 PM
Reposted by Jo Wolfe, PhD
xenomatt.bsky.social
Further Calappa #Crustmas action

bsky.app/profile/xeno...
xenomatt.bsky.social Matt @xenomatt.bsky.social · Jan 25
Box crab (Calappa bicornis, I think), Lembeh

#MarineLife 🦀 #Invertebrate
A pink-ish box crab on dark sand
December 6, 2025 at 5:24 PM
Reposted by Jo Wolfe, PhD
daverodland.bsky.social
Good morning butterflies! I hear you like #Crustmas, so we put barnacles on your barnacles so you can host more epibionts while you epibiont.
Intertidal closeup: acorn barnacles and gastropods
December 6, 2025 at 2:28 PM
Reposted by Jo Wolfe, PhD
menestune.bsky.social
🎶On the 6th day of #Crustmas my true love gave to me.. a black crab near the blue sea 🎶 🦀🦑

#nature #maui #christmas #crustacean #crab #love #black #smallwonders #cool #goodmorning #aloha #christmas #nokings
December 6, 2025 at 3:33 PM
Reposted by Jo Wolfe, PhD
xenomatt.bsky.social
A #Crustmas repost
xenomatt.bsky.social Matt @xenomatt.bsky.social · Dec 7
For whatever day of #crustmas we're on now... a very cooperative and tolerant peacock mantis shrimp posing for a photo in Lembeh.

#MarineLife #invertebrate 🌊
A peacock mantis shrimp, viewed from the side
December 6, 2025 at 3:47 PM
jopabinia.bsky.social
This looks like Carcinus maenas or similar, yes close enough to a real species (in shape, obviously not color!) #Crustmas

I like the detail of the artist reflected in the carapace
dimitriforero.bsky.social Dimitri Forero @dimitriforero.bsky.social · 16h
Nice looking crab graffiti found in the old Las Peñas neighborhood, Guayaquil, Ecuador. @jopabinia.bsky.social might tell us if it is ok or if it is just a wild dream.
A crab graffiti found in Guayaquil, Ecuador
December 6, 2025 at 4:21 PM
jopabinia.bsky.social
#Crustmas although maybe professorial crayfish is...me? 🤔
mondomascots.bsky.social Mondo Mascots @mondomascots.bsky.social · 18h
Zarigani Hakase, a professorial crayfish, and Funadon, a guileless carp, are local characters from Hanyu City.
A tall red crayfish mascot and a short blue carp mascot pose for the camera at a busy street festival.
December 6, 2025 at 3:37 PM
Reposted by Jo Wolfe, PhD
suscipepe.bsky.social
The First Butterfly
#art #illustration
December 6, 2025 at 12:52 PM
Reposted by Jo Wolfe, PhD
himmapaan.bsky.social
#PudgyHorse Lascaux Tribute 2. A companion piece to the first, following one of the other cave horses with a darker colour morph. Again, painted with pigments made by Mary Sanche from Cretaceous rocks from the Albertan badlands. From 2020.

#ArtAdventCalendar
Painting of my character, Pudgy Horse, a horse of baroque type appearance with luxuriant mane and tail, and deliberately exaggerated proportions, including short, slender legs with dainty hooves and an extremely generous girth; here painted in tribute to one of the famous horses in the Lascaux cave paintings using similar colours and simplified shapes.
December 6, 2025 at 3:26 AM
jopabinia.bsky.social
#Crustmas glow
nudibranchnerd.bsky.social Nudibranch Nerd @nudibranchnerd.bsky.social · 1d
10/10 would recommend bringing a dark UV light nighttime tidepooling

🌿🐙🦑🦀
a fluorescing porcelain crab in a tidepool a fluorescing flame-lined chiton in a tidepool
December 6, 2025 at 2:00 PM