Hannes
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federgeistchen.bsky.social
Hannes
@federgeistchen.bsky.social
180 followers 70 following 210 posts
Worm enthusiast 🪱 mollusc maniac 🐌 and crustacean fanatic 🦀
I just prefer my animals boneless…

23 | wildlife photographer | biology student

Non-animal-related account: @eyekosaeder.bsky.social
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federgeistchen.bsky.social
Hannes @federgeistchen.bsky.social · 3d
It is finally #WormWednesday again! 🪱
The perfect time to post my photo of this 40 cm long beast! :D

Scientific name: Phyllodoce lineata

↓ thread with more info ↓

#marinelife #polychaetes #invertebrates
Phyllodoce lineata against a black background. The head (top middle-left) has a bright yellow main colour, turning more muddy towards the tip. There are 4 short antennae located at the front as well as 4 pairs of long "tentacles" (tentacular cirri), 3 of which point backwards, and 1 forwards. In the front half, the back of the body, which is segmented as in all annelids, is also yellow with 3 brown spots per segment (one in the center, 2 on either side at the base of the parapodia). This gives the worm a stripy look. In the back half, the worm is entirely brown. The bottom side of the worm is a light turquoise colour and slightly iridescent. On each segment, the worm carries to leaf-shaped appendages, sometimes referred to as paddles.
Reposted by Hannes
noncompliantcyborg.bsky.social
It’s baby octopus season 🐙🦑

Saw this little guy last night with the Salish Sea School in Anacortes, WA as part of their free community dock walk I volunteer as an interpreter for.

We can tell it is a giant pacific octopus from the single line of chromatophores on each arm.
Four shots of a baby giant pacific octopus bouncing around
November 15, 2025 at 9:32 PM
Reposted by Hannes
oarfishingdaily.bsky.social
Today's Oarfish comes from Mycotae on Twitter! They're an artist who does creepy, realism, sometimes cute and usually centers around horror! #underwater #sealife #marine #fish #Oarfishdaily #marinelife #drawing #marineanimals
Oarfish is a long, snake like fish with long flowing red frills. This one appears to have arms, making it look like a mermaid.
November 14, 2025 at 5:32 AM
Reposted by Hannes
gugunderwater.bsky.social
This little 1” goby chose the most beautiful spot for its home!
November 13, 2025 at 1:26 PM
Reposted by Hannes
scuba-licia.bsky.social
Stunning close ups

#marinelife #macrophptography #underwaterphotography
Pink coral (Siphonogorgia godeffroyi) Purple sponge (Chalinula nematifera) Purple puffball sponge (Oceanapia sagittaria)
November 2, 2025 at 10:15 PM
federgeistchen.bsky.social
It is finally #WormWednesday again! 🪱
The perfect time to post my photo of this 40 cm long beast! :D

Scientific name: Phyllodoce lineata

↓ thread with more info ↓

#marinelife #polychaetes #invertebrates
Phyllodoce lineata against a black background. The head (top middle-left) has a bright yellow main colour, turning more muddy towards the tip. There are 4 short antennae located at the front as well as 4 pairs of long "tentacles" (tentacular cirri), 3 of which point backwards, and 1 forwards. In the front half, the back of the body, which is segmented as in all annelids, is also yellow with 3 brown spots per segment (one in the center, 2 on either side at the base of the parapodia). This gives the worm a stripy look. In the back half, the worm is entirely brown. The bottom side of the worm is a light turquoise colour and slightly iridescent. On each segment, the worm carries to leaf-shaped appendages, sometimes referred to as paddles.
November 12, 2025 at 5:27 PM
Reposted by Hannes
elizabethbeston.bsky.social
This little polychaete larva is having a good wiggle!
#marineplankton 🦑 sound on for funky tunes
November 12, 2025 at 6:50 AM
federgeistchen.bsky.social
I just discovered that my affinity apps no longer work and I had to download the new „free forever“ version.

As much as I like free stuff, this feels very ominous. Canva doesn’t seem that trustworthy to me… And I don’t want yet another good digital resource to go the route of enshittification. :(
November 11, 2025 at 10:48 AM
Reposted by Hannes
nudibranch.bsky.social
Welcome to the 2025 #Nudivember art challenge!

Like last year, here is a list of some lesser known, yet always fabulous, nudibranch species.

Participate as much or as little as you want in any art form you like.

Make sure to use #Nudivember and use alt text!
Nudivember 2025 prompt list 1. Cuthona anulata 2. Cerberilla tanna 3. Halgerda theobroma 4. Glossodoris electra 5. Tambja affinis 6. Diaphorodoris mitsuii 7. Hypselodoris obscura 8. Cerberilla ambonensis 9. Tritonia myrakeenae 10. Chromodoris luteorosea 11. Dendrodoris behrensi 12. Melibe pilosa 13. Doto greenamyeri 14. Cadlinella ornatissima 15. Flabellina ischitana 16. Polycera tricolor 17. Jorunna rubescens 18. Nembrotha cristata 19. Tenellia caerulea 20. Phyllidiopsis sphingis 21. Gymnodoris rubropapulosa 22. Aegires citrinus 23. Okenia mediterranea 24. Mexichromis macropus 25. Hallaxa cryptica 26. Acanthodoris lutea 27. Notodoris minor 28. Favorinus tsuruganus 29. Halgerda brycei 30. Hallaxa fuscescens
October 29, 2025 at 7:49 PM
Reposted by Hannes
philippresl.bsky.social
Lately we have been working on the interactions of #lichens and #mites. This has been super exciting and the first two publications with our findings are now out. Here a quick summary (thread).
November 5, 2025 at 5:53 PM
Reposted by Hannes
xenomatt.bsky.social
I'm not sure *why* we're snailposting, but... okay! Here's a veliger of I know not what species. Pic from a blackwater dive in Balayan Bay, Anilao

#MarineLife #Invertebrates 🌿
A snail veliger. The familiar-looking orange shell points towards the camera; three translucent tentacle-like structures protrude from the mouth of the shell (there are actually four, but one is hidden in this pic) #UnderwaterPhotography #Macro #Nature #Wildlife #WildlifePhotography
November 9, 2025 at 6:54 PM
Reposted by Hannes
elizabethbeston.bsky.social
I don’t find many amphipods in my plankton samples - most are benthic (live on the sea floor), but I’ve had 2 in the last 2 weeks! I’ve not ID’d them yet (so please feel free to save me time and ID them for me if you know!).
#marineplankton 🦑
November 9, 2025 at 4:42 PM
Reposted by Hannes
jopabinia.bsky.social
Okay I am getting creative. Snails are everywhere 🐌

2350m up in the Alps, under da sea, and in between. Heliciniae indet, Doriprismatica atromarginata, Aplysia californica
Heliciniae crawling on a plant in a rock fissure, Gemmipass, Switzerland. The snail is maybe 1-2cm, light colored shell with slight striations in the direction of growth. Mantle is yellowish brown. Eyestalks are out! Doriprismatica atromarginata in Tulamben, Bali. It's a white nudibranch with ruffled mantle edges that are edged in black Aplysia, a sea hare, cruising a tidepool filled with coralline algae. It's mostly dark pink/purple, the color it will ink if you make it upset
November 9, 2025 at 12:43 PM
Reposted by Hannes
ameliacervera.bsky.social
Tumblr post by aylwyyn228: "My PhD research was focused on grief in the 19th century. I can tell you exactly how much they would have wanted modern medicine. I've read so many accounts of people writing about how they would have done anything to save their children, their spouses, their siblings. Mothers and fathers who sat up all night praying that their baby would see the morning. People giving huge sums of money to quack doctors in the hope that they could save their wives. Mothers writing about how they would do anything to not leave their children alone. One father after the loss of his fifth child in a month retelling how he had wanted to go outside and scream, but that he was too tired, so he lay down on the dining room floor instead. After I read all that it feels like an insult that anyone in the modern world would turn down vaccines, when for thousands of years countless people would have given everything they had for the opportunity to save their loved ones."
November 5, 2025 at 8:49 PM
federgeistchen.bsky.social
Also shameless repost for the #snailposting because this is my favourite snail.
federgeistchen.bsky.social Hannes @federgeistchen.bsky.social · 12d
I’m shooting a few mollusc photos for the profs at my university. This one (Calliostoma zizyphinum) is my favourite so far! :D

It’s a nice change not having to mind all the bristles and paddles of the polychaetes I usually deal with!

#marinelife #photography #mollusc #snail #invertebrates
Photos of Calliostoma zizyphinum from four different sides. The shell is cone shaped, roughly as tall as wide and has a beautiful red and white pattern. On the bottom right there is a scale bar and the scientific name (in grey).
November 9, 2025 at 5:01 PM
federgeistchen.bsky.social
It's a #snail. It's round. It's literally named "Rounded Snail" :D
Two snails of the same species (Gonyodiscus rotundatus) stacked on top of each other, the top one being significantly smaller. The houses are very flat, with many ridges.
November 9, 2025 at 4:47 PM
Reposted by Hannes
gugunderwater.bsky.social
While I don’t think anyone has made a specific designation between “larval” and “adult”, in the moorish idol, I’m going to label this one “post-larval”

#moorishidol #blackwater #blackwaterdiving #blackwaterphotography #kumejima #okinawa #chrisgug #gug #gugunderwater
November 8, 2025 at 2:29 PM
federgeistchen.bsky.social
Speaking of asymmetrical crustaceans, look at this huge claw!

Pisidia longicornis, the Long-clawed Porcelain Crab (false crab).

#marinelife #crab #crustaceans #nature #macrophotography
A red and orange crab with a round body and an immense left claw. The legs have small spines on them. The antennae are „striped“ and extend 45° backwards.
November 7, 2025 at 3:43 PM
federgeistchen.bsky.social
A very interesting paper about hermit crab asymmetry! :D

#crustaceans #hermitcrab #marinelife
#biology
jopabinia.bsky.social Jo Wolfe, PhD @jopabinia.bsky.social · 8d
Aha, the paper I really wanted. Here they found it is pretty easy to lose asymmetry, but it's focused on the posterior end

www.nature.com/articles/32798
Genes for asymmetry easily overruled - Nature
Nature - Genes for asymmetry easily overruled
www.nature.com
November 7, 2025 at 10:06 AM
Reposted by Hannes
etilic.bsky.social
📢 The First Circular for the 15th International Polychaete Conference (IPC15) is out! Join us in Frankfurt, Germany • 27–31 July 2026
#IPC15 #Polychaetes #Annelida

polychaete-association.com/ipc15-frankf...
October 23, 2025 at 7:32 PM
federgeistchen.bsky.social
New shell pic! Epitonium clathrus. I love the spiral pattern from the apex-view! It sort of reminds me of romansco (fractal) broccoli. :D

#marinelife #gastropod #snail #mollusc #photography #macrophotography #nature
An overview of Epitonium clathrus. Left: From the side with the aperture visible Top: From the apex Bottom: From the bottom Right: From the side, with the aperture facing away In the bottom right corner there is text with a scale bar and species name. The shell itself is white with a tall spire and 7 whorls in total. Notably, the shell has evenly spaced ribs that go from the bottom all the way to the tip.
November 6, 2025 at 3:33 PM
Reposted by Hannes
petrathepostdoc.bsky.social
dang it bobbit progress video
October 14, 2025 at 3:02 PM
Reposted by Hannes
gugunderwater.bsky.social
I slowed down this vid in the beginning, but let it get to its actual real speed - crazy!
Admittedly, I kept wondering how this #polychaete #worm would be in a marinara sauce, covered in pecorino romano🤤
Shot in #Okinawa.
#marineworm #polychaeteworm
October 14, 2025 at 2:08 PM
federgeistchen.bsky.social
I'm still weirded out by how large the proboscis in Glycera spp. is. You can see the two darker spots in the top right coil of this worm (Glycera fallax). Those are the jaws. The proboscis goes all the way to there.

#worms #polychaetes #annelid #marinelife #nature #invertebrates #macrophotography
A light pink polychaete worm with a magenta line down the center. Some parts are a bit yellowish.
November 4, 2025 at 4:21 PM
Reposted by Hannes
copepodology.bsky.social
Submissions for the WAC Student Grant program are open now until Dec 1. We anticipate making up to three $1,000 awards to support student (graduate or undergraduate) research on copepods. See details👇
www.monoculus.org/student-gran...
STUDENT GRANT PROGRAM
WAC is offering up to three student research grants per year in accordance with the availability of WAC funds, with each award covering up to $1,000 maximum to support copepod research (including but ...
www.monoculus.org
November 4, 2025 at 2:57 PM
federgeistchen.bsky.social
I’m shooting a few mollusc photos for the profs at my university. This one (Calliostoma zizyphinum) is my favourite so far! :D

It’s a nice change not having to mind all the bristles and paddles of the polychaetes I usually deal with!

#marinelife #photography #mollusc #snail #invertebrates
Photos of Calliostoma zizyphinum from four different sides. The shell is cone shaped, roughly as tall as wide and has a beautiful red and white pattern. On the bottom right there is a scale bar and the scientific name (in grey).
November 3, 2025 at 11:36 AM