Jorge I. Merchán M
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roysh.bsky.social
Jorge I. Merchán M
@roysh.bsky.social
39 followers 110 following 61 posts
Biologist
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.
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Living at the sea
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"...rerum natura nusquam magis quam in minimis tota sit" Pliny The Elder
Posts Replies Media Videos
Reposted by Jorge I. Merchán M
evoldir.bsky.social
The Smithsonian Tropical Research Institute is hiring a Marine Scientist to lead research in marine ecology and related fields in Panama. For details on the position, visit: http://www.stri.si.edu/. #job
Smithsonian Tropical Research Institute
Smithsonian Tropical Research Institute
www.stri.si.edu
December 19, 2025 at 4:25 PM
Reposted by Jorge I. Merchán M
nautiluslive.org
#PublicationAlert! A recent paper describes seven new species of Lepidonotopodini #scaleworms from deep-sea chemosynthetic ecosystems, including some samples collected by #EVNautilus in the #Galapagos in 2015. Read it in Marine Biodiversity here: bit.ly/4ofrhws
November 25, 2025 at 3:19 PM
Reposted by Jorge I. Merchán M
echinoblog.bsky.social
From my colleagues at @oceancensus.bsky.social -12 Xmas inspiring invertebrates! oceancensus.org/tis-the-seas...
Tis’ the SEAson: 12 Christmas Inspired Marine Species
In the spirit of the “Twelve Days of Christmas,” we’ve gathered twelve remarkable marine species whose colors, shapes, and surprising behaviors capture the wonder of the season.
oceancensus.org
December 24, 2025 at 10:00 PM
roysh.bsky.social
Finding out that the town you are visiting is full of fossils it's quite a nice surprise
Stone wall with an Ammonite fossil
December 21, 2025 at 11:53 PM
Reposted by Jorge I. Merchán M
bioblogo.bsky.social
Trabajo de verano en patrullas marinas con orcas – San Juan Island (desde 25$/h) www.bioblogia.net/20...

Más ofertas👇
biotapas.bioblogia.net
#empleo #biotapas
November 27, 2025 at 8:14 PM
Reposted by Jorge I. Merchán M
kmkocot.bsky.social
Marine Meiofauna Diversity field course
June 8-18, 2026 at Tjärnö Marine Laboratory, Sweden
Marine Meiofauna Diversity – field course | slu.se
Exploring microscopic animals that shape marine ecosystems, June 8-18, 2026 at Tjärnö Marine Laboratory on the Swedish west coast.
www.slu.se
November 26, 2025 at 5:58 PM
Reposted by Jorge I. Merchán M
tuexplorer1.bsky.social
Idk the ID for this siphonophore, so I'll call it Big Red. @schmidtocean.bsky.social dive 871 #asgardarchaea #MarineLife
November 26, 2025 at 12:54 PM
Reposted by Jorge I. Merchán M
annelidsci.bsky.social
#Wormwednesday The syllid Cryptochaetosyllis imitatio gen. et sp. nov. is one of the top ten year-2024 species selected by judges at WoRMS (world register of marine species)
marinespecies.org/aphia.php?p=...
www.marinespecies.org/worms-top-te...
Nudibranch-like worm on the left and real nudibranch on the right
March 19, 2025 at 5:05 AM
Reposted by Jorge I. Merchán M
yawaguchi.bsky.social
I’ve released a tool to sketch and edit phylogenetic trees!
yawak.jp/PhyloWeaver/

Load a Newick file and intuitively add/remove/resize branches.
Useful for quick conceptual trees, extracting subtrees, or turning ideas into Newick.
PhyloWeaver – Interactive phylogenetic tree editor
Edit and visualize phylogenetic trees directly in your browser. PhyloWeaver lets you interactively rearrange tree topologies and export high-quality figures for publications and presentations.
yawak.jp
November 18, 2025 at 1:59 AM
roysh.bsky.social
"...the debate has perhaps revealed more about the effects of phylogenetic modeling approaches, data curation, and their intersection on the results of phylogenomic analyses than about animal relationships."
agcollins.bsky.social Allen Collins @agcollins.bsky.social · Nov 19
I suppose it is natural to have the comparison point by “human” in discussing the earliest divergence with metazoans. Consider the source! That aside, another marker post in the Porifera-or-Ctenophora first (divergence) is fun to see. www.science.org/doi/10.1126/...
Sponging away phylogenomic incongruence
Genes with strong and consistent signals favor sponges as humans’ most distant animal relatives
www.science.org
November 19, 2025 at 1:29 PM
Reposted by Jorge I. Merchán M
alisonfisk.bsky.social
Something lovely to start the week! 🐙🏺❤️

Ancient clay pots with octopus decoration, made by artisans from Bronze Age Crete some 3,500 years ago!

Heraklion Archaeological Museum 📷 by me

#Archaeology
My photo collage shows four pottery vessels, all a creamy yellow in colour, with black painted decoration depicting underwater sea-life featuring lively stylised octopuses with writhing tentacles (arms), All on display at Heraklion Archaeological Museum, Crete. Top L - Minoan pithoid storage jar decorated in the “Marine Style” with wide-eyes octopus, argonauts, rocks, and coral. Rounded top tapering down to a narrower base. Short cyclindrical neck flaring out at the mouth with black wavy decoration reminiscent of waves. Loop handles attached to the shoulders of the body. Height 55 cm. From Zakros. 1500-1450 BC Top R - Minoan flask with a rounded body, short cyclindrical neck which flares at the rim, and two small curved handles attached between the top of the spout and the shoulders of the body. Decorated in “Marine Style” which depicts an almost cartoon-like octopus with wide eyes and sucker-lined tentacles which writhe around the vase. Other decorative sea-motifs include sea urchins, seaweed and rocks. Height 27cm. From Palaikastro, 1500-1450 BC Bottom L - alabastron, broad at the base, swelling outwards into a fuller belly before narrowing near the top with a very short cyclindrical neck and a wider flat rimmed mouth. Decorated in “Marine Style” with a wide-eyed octopus among rocks. From Knossos Little Palace, 1450-1370 BC Bottom R - krater with rounded body narrowing at the bottom towards the foot. Wide flaring mouth and rim with black painted wavy decoration, and two sturdy handles attached on each side between the top of the mouth and shoulders of the vessel. Decorated with a central very stylised wide-eyed octopus whose tentacles loop up and down around the body of the pot, 1370-1300 BC
November 17, 2025 at 11:04 AM
Reposted by Jorge I. Merchán M
nharmston.bsky.social
interested in understanding non-coding conservation and genome evolution? I have a PhD position in my group looking at the evolution of regulatory domains in annelids ... www.swbio.ac.uk/files/2025/1... .... 100% computational biology PhD ... e-mail me if you're interested / want to discuss further
www.swbio.ac.uk
November 4, 2025 at 9:39 AM
Reposted by Jorge I. Merchán M
caroleeena.bsky.social
I love the story of of how this young person got this shot.
October 31, 2025 at 5:27 AM
Reposted by Jorge I. Merchán M
thegooddotstore.bsky.social
Some people collect vintage technology. Others…socks. We've partnered with Alec Watson at @techconnectify.bsky.social to bring you both. 🧦 Grab a 6 or 12 month subscription to this limited-time collab today (before they're gone): good.store/products/tec...
October 1, 2025 at 6:02 PM
roysh.bsky.social
Sometimes animals just run into you when you get in the sea
Hand holding a shrimp, not sure the species
October 5, 2025 at 7:08 PM
Reposted by Jorge I. Merchán M
em-oyster.bsky.social
📢The Ocean Museum Germany has multiple positions open both as Curator and Researcher and as part of the CUMBIAH research project!🌊

⏳Deadlines are the 30th of October
👉More info on all positions: buff.ly/mcpVJM4
Jobs
buff.ly
September 23, 2025 at 5:17 PM
Reposted by Jorge I. Merchán M
drcraigmc.bsky.social
🌊🔬 Grad Student Opportunity!
I’m recruiting PhD students to explore marine biodiversity, body size, and bioenergetics with flexibility to design your own project! PDF of ad link below.
#PhDPosition #MarineBiology #Macroecology #Biodiversity #GradSchool #Ecology #OceanScience tinyurl.com/5n9434wk
Dropbox
tinyurl.com
September 23, 2025 at 5:54 PM
roysh.bsky.social
This time it's a day off from #WormWednesday but close enough

A Revised Checklist and Identification Key for Acotylean Flatworms (Rhabditophora: Polycladida: Acotylea) from the Caribbean Coast of Colombia

Go and check some cute worms w/ a little bit of science!

doi.org/10.3390/taxo...
doi.org
September 19, 2025 at 2:29 PM
Reposted by Jorge I. Merchán M
tuexplorer1.bsky.social
Black cydippid cteno. I don't see black ctenos too often
@schmidtocean.bsky.social dive 854 #uruguaysub200 #MarineLife
September 17, 2025 at 2:10 PM
Reposted by Jorge I. Merchán M
markppp.bsky.social
#Nudivember

It's slug season, so here's another weird mollusc: hooded nudis, possibly Melibe leonina.

These were snapped in 2012, diving out of God's Pocket resort near Vancouver Island.

We went to "Hooded Nudi Bay" and were worried we might not see any. Saw one, then...

Images by Jackie Hill.
Myriad hooded nudies clinging to kelp... and anything they can rest on. The camera waspointing upwards and the surface can just be seen. There is a green cast to the picture. Hooded nudies on kelp, close to the surface. This shows the natural brownc olour of the weed. The camera is looking towards the surface. A close up of a hooded nudibranch. Its rhinophores are the right of frame. It is whitish and translucent and one can see its innards easily through its skin. I have no idea about the morphology of these freaks, so apologies for not giving a decent description.
November 10, 2024 at 2:39 PM
Reposted by Jorge I. Merchán M
feathertrail.net
I wanted a birding adventure game & there weren't any.
Nearly 4 years into building this now. FT job, a toddler & a baby make it a marathon. But day by day we're getting closer...

Feather Trail is on Steam & you can wishlist it: store.steampowered.com/app/2857180/...

#GodotEngine #gamedev
July 17, 2025 at 4:49 AM
Reposted by Jorge I. Merchán M
jopabinia.bsky.social
Did you know the 1916 paper naming "carcinization" is available online?

It uses the description of a hermit crab, Porcellanopagurus, to discuss evolution of crabbiness from noncrabbiness, as below 🧪🦀🦑

But...this is not the first time the morphology was noticed 1/3

decapoda.nhm.org/pdfs/31940/3...
A normal looking hermit crab with curled abdomen outstretched. FIG. 4. Eupagurus bernhardus : dorsal view of a female specimen, nat. size. 2, 5, Second and fifth terga. Crab looking hermit crab with reduced abdomen. FIG. 5. Porcellanopagurus: dorsal view of the specimen shown in Fig. 1, after removal of most of the eggs, X 4. The end of the fifth leg is also shown enlarged. The limbs of the second, third, and fourth abdominal segments are exposed by the removal of the eggs which they carried ; a few of the eggs remain attached to the long hairs of the appendages. The tergal vestiges upon which these limbs stand are shown. The tergum of the first abdominal segment may be seen in front of the foremost egg-bearing limb. The fifth segment has no hard tergite. That of the sixth segment, composed of four large and two small pieces, is seen behind, between the uropods. c, Cervical groove ; r, rostrum ; 1-4, side-lobes of the cephalothorax.
September 9, 2025 at 4:43 PM
Reposted by Jorge I. Merchán M
k-hermit.com
August 10, 2025 at 11:28 AM
roysh.bsky.social
Sometimes you get to see animals you have never seen before and that's cool :) 🪸
Orange sea pen inside a glass jar filled with seawater. With a small sea start hanging around
August 6, 2025 at 2:24 AM
Reposted by Jorge I. Merchán M
tuexplorer1.bsky.social
A flatworm, or is that a snail shell? Cute little blob. @schmidtocean.bsky.social dive 821 #MarDelPlataCanyon #MarineLife #conicet
August 6, 2025 at 1:52 AM