iiinova — where your digital self keeps evolving

Reposted by Hannes Dahm

Polychaete Bob @polychaetebob.bsky.social · 08/08/2026

A few photos from last week's IPC15 conference in Frankfurt. Many thanks to Carly for capturing them

Hannes Dahm @federgeistchen.bsky.social · 09/09/2026

Next semester I'll start my Master's Degree and I just got my schedule. I'm so excited!! I have nothing but interesting courses! Aaaaah I cannot wait! :D

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Hannes Dahm @federgeistchen.bsky.social · 27/07/2026

Presented my poster at the IPC today. First time ever and also my first conference ever! Very scary!! >.< But I’m really happy with how it went, overall! :D The IPC is great! So much fun! So much interesting stuff! (Free cake as well!) Aaaaahdhfjdjdjdjdfjdjs :D

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Hannes Dahm @federgeistchen.bsky.social · 25/07/2026

Drosophila eggs look surprisingly cool under the microscope! Kinda makes me want to look at eggs of other insects too! #microscopy #macrophotography #zoology #drosophila

The egg of Drosophila cf. melanogaster under the microscope. It has a net-like pattern all across it and two long dorsal appendages protruding from one side, likely for supplying the embryo inside with oxygen

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Hannes Dahm @federgeistchen.bsky.social · 24/07/2026

I’ve been really quiet on here lately since I’ve been busy with designing a poster for IPC15. Aaaaah I’m so excited!! (It will be the first conference for me) Anyway, I fear I’ve left my page unattended for so long that mould has started to appear. Oh no! :0 #microscopy #fungi #mould #photography

Aspergillus sect. Nigri
Black mould photographed with flash + microscope at 10x objective magnification. The image shows various brown spheres which carry the conidiospores (visible as tiny blobs, if you zoom in).

Aspergillus sect. Flavi
A yellow Aspergillus. The conidia are even more visible here and form little rows that emanate from the heads like rays.

Unidentified blue mould.
The fruiting bodies on this one are very small, so you only see bunch of bluish-grey spheres.

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Moths in a human suit (they/them) @lycomorpha.bsky.social · 02/07/2026

I've had an idea in my sketchbook for awhile to draw cryptic moths (eg waved umber, green carpet) with part of the background faded or cut out. So you could appreciate how effective their camouflage is, & also how beautiful they are in their own right. I never got time to try it tho… Until now! 😁

Two very small outline sketches of hawkmoths on a circular background. The moths are only outlined, the circles are filled half in light brown and half in dark brown, in ink.

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Hannes Dahm @federgeistchen.bsky.social · 23/06/2026

So, I tried a new microscope technique today… Let’s just say it was successful! :D #microscopy

Closeup of the scutellum of Fasta fastuosa

An even-closer-up of the exoskeleton in that area

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Reposted by Hannes Dahm

Martyn Warren (he/him) @martynwarren.bsky.social · 21/06/2026

Here's another one, Eumolpus asclepiadeus.

Close up of a drawing of a very shiny blue beetle. It has a slighlty pitted surface on the elytra.

A zoomed out shot showing more of the shiny elytra.

A full body shot showing the beetle's splayed legs.

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Hannes Dahm @federgeistchen.bsky.social · 19/06/2026

So the bad news is that my plants have thrips. 😓 The good news is that I got a great photo! #thrips #microscopy #entomology

Darkfield micrograph of a thrips (Parthenothrips dracaenae). I spread the wings using a fine needle so that both pairs are visible.

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Hannes Dahm @federgeistchen.bsky.social · 04/06/2026

I was very surprised to find this beetle larva in my marine/brackish water sample today. I thought aquatic beetle larvae occurred exclusively in fresh water! If you have any idea as to what species/genus/family this belongs to, please let me know. I’m very curious! :D #microscopy #beetle #larva

Head of a beetle larva I found in a brackish/marine habitat. Brightfield microscopy. 10x objective

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Hannes Dahm @federgeistchen.bsky.social · 03/06/2026

I went to the sea last week and took some water for microscopy. Found a flatworm and just look at those cells! So pretty :D #microscopy #wormwednesday #flatworm

Photo of (almost) the entire worm in regular brightfield microscopy. The intestine is visible as a sort of meandering river of darker cells. Near the middle there is a repeating structure that I think may be eggs/egg-bundles/ovaries?

The middle part, zoomed in further. You can see the cells that line the intestine as well as the ovaries(?) more clearly

Detail of the front part with a large statocyst.

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Hannes Dahm @federgeistchen.bsky.social · 11/05/2026

Found three different species of pseudoscorpions yesterday and they‘re all from different species as well! :D #arthropod #mesofauna #pseudoscorpion #arachnid

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Reposted by Hannes Dahm

Ari Ganahl 🦑🔞 @arithetonberry.bsky.social · 05/05/2026

I can finally share the Giant Clam illustration I created for @20kleagueszine.bsky.social !! 🐠🐡🦑 #invert This was my favorite illustration of 2025 :) My papercraft has evolved considerably over the last few years

Papercraft collage looking straight down at a giant clam on the ocean floor. Its flesh is a vivid blue, and its shell is textured and covered in moss. Around the clam are sea grass, isopods, coral, sea stars, sponges, and a rock structure.

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でんか @k-hermit.com · 03/05/2026

もちもち春の風物詩

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Peter Braubach @peterbraubach.bsky.social · 02/05/2026

Flabellospora acuminata - in a foam sample from northern hessia from last december. #AquaticHyphomycetes

Star shaped conidium of Flabellospora acuminata.

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Hannes Dahm @federgeistchen.bsky.social · 29/04/2026

I don’t remember whether I posted this one, but for this #WormWednesday here‘s Alentia gelatinosa! 🪱 #MarineLife #Polychaete

A. gelatinosa from below (ventral) showing the iridescence of the body. You can also make out the parapodia very well against the huge jelly-like scales.

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Hannes Dahm @federgeistchen.bsky.social · 29/04/2026

iNatting for the City Nature Challenge with spectacular scenery! #landscape #nature #iNat #citynaturechallenge

Me standing on the shore of a small lake that is surrounded by cliffs

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Hannes Dahm @federgeistchen.bsky.social · 19/04/2026

If life hands you a deadline, draw polychaete stickers! (Am supposed to be working on velvet worm nephridia, but oh well…) #polychaete #worm #art #marinelife

A (non-realistic) „sticker“ I drew in procreate of Eulalia sp., a green paddle worm of the family Phyllodocidae.

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Hannes Dahm @federgeistchen.bsky.social · 10/04/2026

Onychophorans are weird. They have 3 different kinds of nephridia. Small ones in the first 3 pairs of legs. Huge ones in 4 and 5. And „typical“ ones in all the remaining ones. Also in 4 or 5, instead of having the opening (nephridiopore) at the base of the legs, they open right at the feet. Wth??

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Reposted by Hannes Dahm

christiannby.bsky.social @christiannby.bsky.social · 09/02/2026

Die letzten Wochen war hier alles gefroren. Einzig ein Entwässerungsgraben war eisfrei, aber in dem gibt es nur Ruderfußkrebse. Darum habe ich ausführlich Copepoden fotografiert. Von dorsal und ventral

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christiannby.bsky.social @christiannby.bsky.social · 16/02/2026

Harpacticoida Copepoden sind nicht leicht zu fotografieren. Ich habe nur sehr wenige Fotos von denen. Heute habe ich ein Weibchen ventral mit angehängter Spermatophore ablichten können.

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Hannes Dahm @federgeistchen.bsky.social · 03/04/2026

Breaking news! I have successfully adapted the camera to my microscope! Yaaay! Still need a bit more distance for parfocality with the eye pieces, so I‘m ordering a helicoid extension tube.

The head of my bx41 microscope with my camera adapted to the top of it.

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Reposted by Hannes Dahm

Elizabeth Beston @elizabethbeston.bsky.social · 02/04/2026

This week’s UV copepods! I swear these colours are getting wilder every week. #marineplankton 🦑

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Hannes Dahm @federgeistchen.bsky.social · 02/04/2026

Went to a marine exhibition at the Bundeskunsthalle today. Great exhibition all the way through. But I was particularly stunned by the crocheted coral reef. I think this is one of the most beautiful and impressive works of art I‘ve seen. It‘s a collaboration by a few hundred (>1000?) artists.

A small part of the entire artwork. Crocheted corals of various kinds and other reef-life in yellows oranges and reds. It doesn’t even begin to capture the beauty of it irl

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Elizabeth Beston @elizabethbeston.bsky.social · 29/03/2026

Hello cutie squish squash Spionidae larva! A gorgeous little polychaete (bristle worm) larva from last week’s sample. #marineplankton 🦑

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Reposted by Hannes Dahm

でんか @k-hermit.com · 29/03/2026

✹✹✹

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Reposted by Hannes Dahm

Chris Mah @echinoblog.bsky.social · 02/04/2025

oh interesting! A polychaete Phyllodoce mucosa surrounding this green ball! is that where the species epithet comes from ? A mucus ball? eggs? interesting! #wormwednesday www.inaturalist.org/observations...

inaturalist.org

Phyllodoce mucosa

Phyllodoce mucosa from Isle of Man on March 30, 2025 at 04:10 PM by rhias

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Hannes Dahm @federgeistchen.bsky.social · 23/03/2026

Just a photo from yesterday‘s walk that‘s horribly overexposed, but that I like a lot. Spring is here! :D #cherryblossom #spring

View from underneath cherry tree in full pink bloom.
Due to the over-exposure the sky is almost completely white.

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Reposted by Hannes Dahm

Moths in a human suit (they/them) @lycomorpha.bsky.social · 18/03/2026

Joining in with the reference vs. art thing 🌿

Reference pic of a small spring og beech leaves that are in the process off turning into their autumn outfit, changing from green through yellow and orange to brown. It's for the drawing in the next pic.

A colour pencil drawing of the turning beech leaves from the photo in the previous image. It's a reasonable representation of them.

A close up on part of the drawing showing details on the turning leaves and the dark brown bark of the twig.

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Reposted by Hannes Dahm

Elizabeth Beston @elizabethbeston.bsky.social · 18/03/2026

Three copepods under UV from my sample last week. A female Pseudodiaptomus marinus, a female Pseudocalanus sp., and a Harpacticoida (I don’t know genus). #marineplankton 🦑

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Hannes Dahm @federgeistchen.bsky.social · 08/03/2026

I‘m gonna have a great day tomorrow! :D

Bluray box of the complete series of Planet Earth.

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Hannes Dahm @federgeistchen.bsky.social · 05/03/2026

Another copepod for you! <3 I just think they‘re very neat. This one‘s Eucyclops sp. #pondlife #microscopy #crustacean #copepod

Copepod female as seen through a microscope at 100x total magnification. Lateral view. The background is turned black.

The copepod is currently carrying two pale greenish egg sacs.

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Hannes Dahm @federgeistchen.bsky.social · 28/02/2026

Another Onychophore post! :) This time the whole animal from the side. I’m surprised by how well the colours got preserved. Apparently it has been collected a couple decades back and stored in ethanol ever since #onychophore #photography #macrophotography

Onychophore-closeup against a black background.

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Reposted by Hannes Dahm

Elizabeth Beston @elizabethbeston.bsky.social · 28/02/2026

A helluva chonk of a bristle worm! This is the larva of a polychaete from the genus Scolelepis and it was hard to miss! #marineplankton 🦑

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Hannes Dahm @federgeistchen.bsky.social · 25/02/2026

Haven’t posted a polychaete in a while… :) This one’s Arenicolides branchialis. I love this very deep and dark iridescent green colour it has. In person it looked almost black. #polychaete #worm #WormWednesday

Closeup of A. branchialis against a black background. It is very clearly segmented. Every 5 segments is a chaetiger (bristle-carrying segment). Later (on from chaetiger 11 or 12) the worm has very pronounced branchiae that were definitely not a nightmare ar all to draw the black background around, I promise you. :)

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Hannes Dahm @federgeistchen.bsky.social · 25/02/2026

I hope, the people whom I’ve told “I’m doing 3D reconstruction of animals with a microCT scanner to visualise their anatomy and morphology” never find out that most of that is just me colouring in pictures like in a colouring book.

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Hannes Dahm @federgeistchen.bsky.social · 25/02/2026

First proper microscopy session with the new scope! Experimenting with the light to get a DIC-like effect. This is what I got so far. I’m quite happy, but it only really works on the 20x objective! ^^ Images show stuff growing on a copepod. #microscopy

Photo stack taken with my iPhone through an eye-piece at 200x + digital crop.

Algae and peritrich(?) ciliates attached to a copepod.

Single shot, but everything else is the same as last image. Cropped more to focus on the two ciliates.

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Reposted by Hannes Dahm

Society for Developmental Biology @socdevbio.bsky.social · 20/02/2026

✨Kelp embryos looking extra photogenic under the confocal today 🌱🔬 Young Egregia menziesii embryos developing from the megagametophyte 📸 Image by Siobhan Braybrook #FluorescentFriday

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Hannes Dahm @federgeistchen.bsky.social · 21/02/2026

Yet again the same worm. Regular photo this time. I just finished turning the background black. :) The little “paws” are very cute, but the mouth is terrifying. #photography #macro #worm #onychophora

Macro photo of the head Peripatoides novaezealandicae from ventral.
You can see the “teeth” very well. And if the upload quality is enough the structure of the cuticle (better than on the mCT scan).
You can even see what I have called the “thingies on the thingies”.

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Hannes Dahm @federgeistchen.bsky.social · 20/02/2026

Same Onychophore (velvet worm) as yesterday, but from the outside. It looks so alien! :D #biology #worm #3D

Screenshot of a digital 3D model. 3D reconstruction made from Micro-CT scan of an Onychophore.

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Hannes Dahm @federgeistchen.bsky.social · 18/02/2026

I love visual science! Made these today. What you can see are two cross-sections of an Onychophore from different angles.

Sagittal cut. I love how you can see the antennal nerve. Also the brain is very cool.

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Hannes Dahm @federgeistchen.bsky.social · 17/02/2026

They are here, finally. Let’s gooooo!

Photo of the nose piece/objective turret of my microscope with three objectives (from right to left: 4x, 10x, 20x. All Olympus UPlanFL N)

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Elizabeth Beston @elizabethbeston.bsky.social · 03/02/2026

My first ever UV microscopy image! This is a Halacaridae mite, but I think it might just be an exoskeleton. It glowed gloriously under the UV light source! #marineplankton 🦑

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Veeloxxy Bites @the-episiarch.bsky.social · 04/02/2026

Tergivelum cinnabarium is species of deep sea acorn worm which is noted for being a big fan of Junjo Ito's Uzumaki #Invertebrate 🧪 www.sciencedirect.com/science/arti...

Four photos of the deep sea acorn worm Tergivelum cinnabarinum leaving a distinct, spiral-shaped feeding trail on the sediment.
Photo from: Jones, D. O., Alt, C. H., Priede, I. G., Reid, W. D., Wigham, B. D., Billett, D. S., Gebruk, A. V., Rogacheva, A. & Gooday, A. J. (2013). Deep-sea surface-dwelling enteropneusts from the Mid-Atlantic Ridge: their ecology, distribution and mode of life. Deep Sea Research Part II: Topical Studies in Oceanography, 98, 374-387.

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Hannes Dahm @federgeistchen.bsky.social · 30/01/2026

FedEx still hasn’t managed to deliver my package because apparently my address doesn’t exist. (Spoiler: It does which I happen to know because I live there) They have now called me to confirm the address *again* and said, it will be delivered on Monday. Wish me luck that they find it this time 😑

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Hannes Dahm @federgeistchen.bsky.social · 26/01/2026

Oops. I almost said something positive about FedEx last week, when they managed to get my package from Japan to near my city in only 3 days. (But then they tried to deliver it to somewhere in the wrong city and it has been stuck in that city since and the delivery date ._.)

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でんか @k-hermit.com · 24/01/2026

Look closely at the surface of the sea cucumber… There’s a strange little creature hiding there! This scale worm changes its coloring to match its sea cucumber host. You’d never notice it unless it moves. Such amazing camouflage! ✨️

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Hannes Dahm @federgeistchen.bsky.social · 18/01/2026

Interesting times ahead! Just bought this microscope today and carried it (with the help of 4 different trains) halfway across Germany. My back hurts, I am exhausted, but it was very worth it! #microscope #biology

Olympus BX41 compound microscope with trinocular head, fluorescence capability (has three filter cubes), and a phase contrast condenser. Next to it the power supply for the mercury vapour lamp.

The microscope is fully functional (electronics and mechanics work perfectly) I just need to get some eye pieces and objectives.

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