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#molluscmonday again! And we are featuring something that is not a nudibranch this time. The Spotted sea-hare (Aplysia punctata). Fun fact, this one can spit ink to scare away predators, like a cephalopod 🤿🦑 Taken 2025-06-06 in the Smögen Archipelago. Camera: Olympus TG-5

A close up photo of a Spotted sea hare. The sea hare is pinkish red with white dots. It is crawling on white shell gravel. It is crawling towards the left of the photo.

A close up photo of two Spotted sea hares, a smaller and a bigger individual. The sea hares are pinkish red with white dots. The smaller sea hare is crawling on the big one's back, the bigger one is crawling towards the right of the photo.

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Emil @bergylta.bsky.social · 05/10/2026

For this #molluscmonday we got a large one, the Tritonia hombergii. This sea slug grows to about 20 cm, which is gigantic compared to most other species in Sweden. Taken: 2026-05-14. Bergylteskär, Lysekil. Camera: Olympus TG-5 🤿🦑

A photo of a Tritonia hombergii sea slug. The sea slug is grey in colour with orange edges. The sea slug is crawling on a rocky wall with pink encrusting coralline algae.

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Emil @bergylta.bsky.social · 28/09/2026

Another week and another #molluscmonday. This time we got the Facelina bostonensis nudibranch, which i saw on a scuba dive on a cold november day. It is also known as "Dragon nudibranch" in Swedish. 🤿🦑 Taken 2023-11-11 in Jordfalls Hamn camera: Olympus TG-5

A photo of a beige-pink Facelina bostonensis nudibranch. The nudibranch has white tips of its cerata (pointy bits on its back). It is crawling on a stalk of algae, laying a string of white eggs.

A photo of a beige-pink Facelina bostonensis nudibranch. The nudibranch has white tips of its cerata (pointy bits on its back). It is crawling on a light-brown substratum

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Emil @bergylta.bsky.social · 21/09/2026

For this #molluscmonday, we feature the Northern Cowrie (Trivia arctica), also known as "Coffee bean" in several languages ☕ Taken 2026-04-06, Dolmsundet marina in Hitra.🦑🤿 Camera: Olympus TG-5

A tiny Northern Cowrie crawling on a piece of a ship wreck. The Northern Cowrie is beige with lighter spots. the substrate is brownish.

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Emil @bergylta.bsky.social · 14/09/2026

For this #molluscmonday we got two teeny tiny Candiella lineata nudibranchs. Was real hard to spot them on the dive actually, but somehow I did it. 🦑🤿 Taken 2026-05-14, Lysekil Archipelago Camera: Olympus TG-5

Two tiny Candiella lineata sea slugs on a brown-beige rocky bottom. The seaslugs are semi-transparent with two stark-white lines running along their backs. The sea slugs are facing two different directions, the closer one is facing left, the one further away is facing right.

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Emil @bergylta.bsky.social · 31/08/2026

For this #molluscmonday we got one of my favourite molluscs to find. A Common bobtail squid (Sepietta oweniana). Taken: 2023-12-16 Camera: Olympus TG-5 #aquaticlife #bobtailsquid #marinelife #naturephotography #nordicdiving #scubadiving #sepietta #sepiettaoweniana #scuba #underwaterphotography

A small Common bobtail squid (Sepietta oweniana) on a sandy seafloor. The squid has a round body with a reddish colour. Its eyes are reflecting a iridescent green colour. The seafloor is pale-beige in colour. The squid is facing towards the right.

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Emil @bergylta.bsky.social · 30/06/2026

Lots of European lobsters (Homarus gammarus) this week's dives, a whole 14 of them all in all. Taken 2026-06-28. 🦑🤿 #aquaticlife #homarusgammarus #europeanlobster #lobster #marinelife #marinelifephotography #naturephotography #nordicdiving #scuba #underwaterphotography Camera: Olympus TG-5.

Photo of a large European lobster in a rocky crevice. The lobster is peeking out of the crevice. The carapace of the lobster is black, with red edges on its claws, only the crushing claw is visible as the cutting claw is hidden behind a rock. The rocks around the lobster are encrusted with pink calcerous algae.

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Emil @bergylta.bsky.social · 22/06/2026

Candy-striped flatworm (Prostheceraeus vittatus) seen on dives this weekend, for being a flatworm it sure is pretty 🤿🦑 Taken: 2026-06-21 Camera: Olympus TG-5 #aquaticlife #gullmarn #marinelife #naturephotograpy #nordicdiving #planarian #scuba #underwaterphotography

A white flatworm with black stripes, the flatworm is crawling towards the viewer on some brown algae

A white flatworm with black stripes, the flatworm is crawling towards the viewer on some brown algae and transparent tunicates

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Emil @bergylta.bsky.social · 08/06/2026

The Aesop shrimp (Pandalus montagui) is a bit of a rarer sight this time of the year, at least on the depths i dive on Taken 2026-06-07 Camera: Olympus TG-5 🦑🤿 #aquaticlife #pandalusmontagui #shrimp #nordicdiving #crustacean #crustaceanphotography #scubadiving #underwaterphotography

Photo of a semi-transparent shrimp with red stripes. The shrimp is crawling on a pink-encrusted rock. The perspective of the image is slightly from above and from the side.

Photo of a semi-transparent shrimp with red stripes. The shrimp is standing on some beige soft-mud seafloor. The shrimp is facing the viewer.

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Emil @bergylta.bsky.social · 02/06/2026

Got me a rather nice photo of a North-Sea tube anemone (Synarachnactis lloydii) on this weekends dives, really liking the colour contrast 🦑🤿 #underwaterphotography #cnidarian #tubeanemone #ceriantharia

A tube anemone sitting burrowed in a brownish seafloor. The colour of the tube anemone is dark-brown tentacles and a stark-white oral disc.

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Emil @bergylta.bsky.social · 04/05/2026

#MolluscMonday with piping fresh nudibranch from the weekend, this time we are dealing with the Angular seaslug (Okenia nodosa) 🦑🤿 Taken: 2026-05-02 Camera: Olympus TG-5 #aquaticlife #nudibranch #naturephotography #marinelife #swedishdiving #coldwaterdiving #scuba

Close-up of a semi-transparent pale seaslug with small yellow spots. The seaslug is crawling away from the viewer on a rocky bottom with brownish sediment

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Emil @bergylta.bsky.social · 27/04/2026

Piping hot fresh nudies for #MolluscMonday This time it is two species of nudibranchs, Coryphella verrucosa and Acanthodoris pilosa Taken: 26/4/2026 Camera: Olympus TG-5 🦑🤿 #nordicdiving #scubadiving #naturephotography #nudibranchs #uwphotography #underwatermacrophotography

a red-finger sea slug crawling towards the viewer on a rock encrusted with pink calcareous red algae.

A tiny white seaslug with a "flower" on its butt crawling downwards on a piece of algae.

A Red-finger sea slug crawling towards the viewer on a blackish rock.

A beige-white sea slug with a "goosebumpy" texture on a piece of grey rock.

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Emil @bergylta.bsky.social · 08/03/2026

First dive of the year! and in perfect season for Norway King crab. Was cold in the water though, a whopping 0 C in the first 5m 🤿 🦑 Taken 7/3/2026 Camera: Olympus TG5 #crustacean #nordicdiving #scuba #naturephotography #underwaterphotograpy #lithodesmaja

A Norway king crab with a spiny reddish carapace walking on a brownish-grey soft mud seafloor. The crab is facing the left side of the image.

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Emil @bergylta.bsky.social · 11/11/2025

This year has been quite good for Surmullet (Mullus surmuletus) in Sweden, especially on night dives, saw several this past weekend. 🤿🐙🦑 Taken 9/11 2025 Camera Olympus TG-5 #aquaticlife #marinelifephotography #naturephotography #nordicdiving #scuba #underwaterphotography

A close up photo of a pale fish with red marbling resting on a shell-gravel seafloor. The fish is facing straight towards the viwer.

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Emil @bergylta.bsky.social · 14/07/2025

#MolluscMonday with piping fresh mollusc photos from the weekend, this time we got the Velvet dorid (Jorunna tomentosa) as our featured species, this is one of the larger species found in Sweden, so often quite easy to spot. Taken 12/7 2025 at Fossens Camping, Gullmarsfjorden, Sweden Olympus TG-5

Photo of a pale-yellow sea slug crawling towards the camera from a slight front-side perspective. The seaslug is crawling on a brownish-grey sediment seafloor.

Photo of a pale-yellow sea slug crawling straight towards the camera. The seaslug is crawling on a brownish-grey sediment seafloor.

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Emil @bergylta.bsky.social · 09/06/2025

Once again it is #MolluscMonday with piping fresh mollusc photos from the weekend, this time a for me new species, the Crystal sea slug (Antiopella cristata), and i have to admit, it is one of the prettiest nudibranchs i've ever seen 🦑🤿 Taken 6/6 2025 Camera Olympus TG-5

Close up photo of a sea slug with its back covered in transluscent appendages, each appendage has a vibrant blue tip. The seaslug is crawling on yellowish-brown algae

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Emil @bergylta.bsky.social · 05/05/2025

#MolluscMonday is here again, and after a longer hiatus, i have been able to get into the water once more This time it was mainly Orange-brown aeolids (Aeolidiella glauca), a rather unassuming species of nudibranch Taken 3/5 2025 in Gullmarsfjorden 🦑🤿

a small brownish seaslug crawling away from the viewer, the perspective is from above and slightly behind

A small grey-ish seaslug with white "antennae" crawling down a wall

A small grey-orange seaslug crawling towards the viewer

A small brown-ish seaslug with white antenna-tips crawling over some algae towards the camera

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Emil @bergylta.bsky.social · 17/03/2025

Another week, another #MolluscMonday, and once again, there's piping hot fresh nudi photos from the weekend. 🦑🤿 This week we have the nudibranchs Acanthodoris pilosa and Dendronotus lacteus Taken 15/3 2025 Camera: Olympus TG-5

Close up photo of a white Acanthodoris pilosa seaslug crawling downwards on a piece of brownish algae, the seaslug is covered in small knobs all along its body.

Close up photo of a white Acanthodoris pilosa seaslug crawling towards the viewer on a brown seafloor, the seaslug is covered in small knobs all along its body.

Close up photo of a white Acanthodoris pilosa seaslug crawling upside down on a piece of brown algae, the seaslug is covered in small knobs all along its body.

A large white seaslug with tree-like branching growths on its back, the seaslug is crawling on some red algae

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Emil @bergylta.bsky.social · 24/02/2025

A rainy and cold #MolluscMonday it is, but this week, I once more got some piping hot nudibranchs fresh from the cold seas of Sweden. Taken: 23/2 2025 Camera: Olympus TG-5 🦑🤿

White seaslug with yellow spots crawling on greyish-brown soft mud

Front-facing brown seaslug with a slight yellow tinge crawling towards the camera on brown mud

Close up of a large dark-brown seaslug with a slight yellow tinge crawling towards the camera on brown mud

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Emil @bergylta.bsky.social · 10/02/2025

Surströmming perhaps? that would really make a point i am sure :)

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Emil @bergylta.bsky.social · 10/02/2025

This #MolluscMonday we got some piping hot fresh nudibranch photos :) A Coryphella verrucosa and what i think is a Idaliadoris depressa(?) Both taken 9/2 2025 🤿🦑

Photo of a tiny white semitransparent nudibranch with a "fuzzy" look to it, the nudibranch is crawling on a piece of algae.

Photo of a seaslug possessing reddish-brown "spines" with stark white tips, the nudibranch is crawling on a piece of dark-brown seagrass.

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Emil @bergylta.bsky.social · 27/01/2025

What better way to start the week than with a cute little bobtail squid (unsure if Sepietta oweniana or Sepiola atlantica) for #MolluscMonday? These cuties are present all year round, but prefer to be out after dark, which is hard in summer here Taken 2023-11-04 on Divers Night in Lysekil 🤿🦑

Close up photo of a small red squid peeking out of the soft sediment, the eyes take up a large part of the head and have a slight silvery sheen to them

Close up photo of a small red squid on shell-gravel seafloor, the squid is facing the viewer with its large eyes that have a silvery sheen to them.

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Emil @bergylta.bsky.social · 23/12/2024

So worm is another ultimate shape of being, interesting... 🤔

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Emil @bergylta.bsky.social · 11/12/2024

Who is featured this #WormWednesday? Well that would be the King ragworm (Alitta virens), sometimes known as Sandworm. While it may not reach the sizes of its sci-fi counterpart of Arraksis, it is a species that can grow to quite the size (20-30 cm according to Artfakta.se) Taken 9/5 2021 🤿🦑

A large blue-green polychaete worm crawling among brown algae on a beige shell gravel seafloor

Close up face of a blue-green polychaete worm with a metallic sheen, the worm is crawling among some brown algae

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Emil @bergylta.bsky.social · 27/11/2024

Oh Worm? Another week, another #WormWednesday, still no good worm photos this year, so I got a Sea mouse (Aphrodita aculeata) from last year instead for now. In my opinion, it is one of the prettier polychaetes we got in the Nordic seas :) 🦑🤿 Taken: 30/04/2023 Camera: Olympus TG-5

Sediment-covered scaleworm with iridescent green-gold bristles on the side of its body, the worm is facing slightly sideways towards the viewer while crawling on a greyish beige soft bottom seafloor.

Close up of the green-gold bristles on a Sea mouse scaleworm, the bristles are really shining and glittering

Sediment covered scaleworm with iridescent green-gold bristles crawling on a brownish beige soft bottom, the perspective is from the side and slightly from the above

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Emil @bergylta.bsky.social · 20/11/2024

Well would you look at that, it is #WormWednesday, sadly i don't got any good worm photos this year, but here, have a Oxydromus flexuosus (unsure if it has a English common name, in Sweden we call it "Green-white flailing worm") that i took a few years ago Taken 13/11 2021, Camera: Olympus TG-5 🦑🤿

Dark-brown polychaete worm with neon-green banding on its body and neon-green dots along its sides. The worm is facing away from the viewer on a beige sandy bottom. Due to the zoom of the photo, the sand grains appears as very coarse, but is in fact very fine-grained.

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Emil @bergylta.bsky.social · 16/11/2024

Can confirm, I use a TG5 for my scuba photos, best bang for the buck in the compact class imho, at least for macro

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Emil @bergylta.bsky.social · 12/11/2024

I was recently tipped off by another local marine biologist that "Mud diver shrimp" (Processa nouveli) is a thing, and well... they are quite common on night dives. So you learn something new every day, had completely overlooked these cuties while over the soft bottom looking for 🦑

Close up photo from the front of a small pinkish shrimp with white front legs and iridescent blue-grey eyes. The shrimp is crawling on a beige soft mud seafloor and looking straight into the camera lens

Close up head photo of a small semi-transparant shrimp with white legs and reddish orange pigment dots on its body, the eyes are a irridescent blue-grey colour. the photo is taken slightly from behind the shrimp. The shrimp is crawling on a beige-brown soft mud seafloor

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Emil @bergylta.bsky.social · 07/11/2024

I agree, chopsticks are utensil perfection incarnate

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Emil @bergylta.bsky.social · 06/11/2024

Welcome to Shadowbringers, enjoy the ride

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Emil @bergylta.bsky.social · 03/11/2024

A bit late for #WorldJellyfishDay because I totally did not forget the date or anything, Nuh uh ‹_‹. Aaaanyways, have a Crystal Jellyfish (Arquorea vitrina) taken on Divers night in Lysekil 2024 🤿🪼🦑

Transparent Jellyfish with a blue tinge and opaque rib-like structures inside its body. Hovering over a sandy beige seafloor, surrounded by bright green stalks of seagrass.

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Emil @bergylta.bsky.social · 29/10/2024

Well would you look at that, it is #SeaslugDay! time to post some nudibranch photos, this photo of a Facelina bostonensis, which we call Dragon nudibranch in Sweden, was taken in November last year, nudibranch season hasn't quite started up in my area just yet, but soon 🤿🦑

A photo of a Facelina bostonensis seaslug facing the camera, with beautiful orange-beige cerata tipped with white

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Emil @bergylta.bsky.social · 28/10/2024

Sure is, see them every now and then on sculpins, flatfish and monkfish in my area 😁

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Emil @bergylta.bsky.social · 14/06/2024

Haven't posted on my scuba blog in ages, but i guess here goes? The latest underwater adventures in the cold nordic waters :) 🤿🦑 swedishdiving.blogspot.com/2024/06/jord...

swedishdiving.blogspot.com

Jordfalls hamn 9/6 2024 Eh? is this thing still on?

A Swedish diver's adventures in the Nordic waters, done in a way similar to a divers log book

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Emil @bergylta.bsky.social · 15/03/2024

This is sad 😢 Wonder what could be done to prevent at least a portion of this

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Emil @bergylta.bsky.social · 12/03/2024

Would that there was a way to track, or at least take care of these nets 😢

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Reposted by Emil

Lachlan Fetterplace @fiskeforbrains.bsky.social · 11/03/2024

Scientists raise the alarm: Too many harbour porpoises dying in nets. In Danish coastal waters over 900 die each year vs a 24 death limit that would keep Belt Sea population stable. In 2012 & 2016, there were around 40.000 individuals, by 2022, only 14.000 left. 🧪🦑🌎 tech.au.dk/en/about-the...

"A dead harbour porpoise on the beach in Løkken, Denmark. Part of the net that it got entangled in is still visible. It's estimated that 900 harbour porpoises die every year as by-catch in the fishing industry. Photo: Lisbeth Cedray"

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Emil @bergylta.bsky.social · 11/03/2024

Finally broke my long surface interval from diving this weekend, while waters were cold, it was so nice to be back in business! Got some photos too, but i forgot to turn off the camera between the dives, so it ran out of battery on the second dive, when all the nicer things showed up 🤪 🦑🤿

White, semi-transparent, nudibranch with branching cerata crawling on a pink-encrusted piece of shell. The species is likely Dendronotus frondosus

A close up photo of a oat-pipe hydroid from the side, with its tentacles splayed out, the colour is pinkish with transparent tentacles and a beige stem

A sea anemone with a beautiful pattern of white and dark brown on the oral disc, at the base of the tentacles. A stark white line runs from the mouth to the base of the tentacles, towards the viewer

Sea anemone with a pinkish-red oral disc, and darker red triangle patterns on the oral disc, sitting on a sediment covered rock.

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Emil @bergylta.bsky.social · 21/02/2024

Another Wednesday, another reason to be pink. This is a Bryer's Nut crab (Ebalia tumefacta), a tiny species of crab that can be found on sandy, rocky and gravel seafloors. this particular individual was seen during Diversnight in Lysekil 2023 (no clue how i even spotted it) 🦑🤿📷🦀

A very small crab with very small eyes and a pink carapace, walking over shell gravel, there is some dust on the carapace itself as well

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Emil @bergylta.bsky.social · 20/02/2024

This is the ideal crustacean body. You may not like it, but this is what peak crustacean shape looks like :)

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Emil @bergylta.bsky.social · 15/02/2024

I am not surprised honestly, I too would be a bit miffed if someone came up and randomly brushed me with a kitchen brush 🤣 All hail the mighty KBOS🙌

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Emil @bergylta.bsky.social · 14/02/2024

that is indeed very smol :O

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Emil @bergylta.bsky.social · 14/02/2024

On Wednesday we wear pink! Though the name of the nudibranch is Violet sea slug (Edmundsella pedata), i'd say this one from Väderöarna archipelago is of a sufficiently pinkish colouration, right? 🤿🦑 #Nudibranch Photo date: 2021 07 24 Camera: Olympus TG-5

Puprple-pink coloured nudibranch with beautiful white "spine-tips" and tip of antennae, crawling on yellowish brown algae, the animal is facing away from the camera

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Emil @bergylta.bsky.social · 09/02/2024

Happy flatworm Friday everyone, here have some Candy-striped flatworm (Prostheceraeus vittatus) photos taken July and September last year 🦑 🐛

White flatworm with black, lengthwise, stripes on a rocky substratum facing forward towards the camera

White flatworm with black, lengthwise, stripes crawling on a algae covered rock, the photo is a bit more zoomed out, showing the whole body

White flatworm with black, lengthwise, stripes crawling on a algae covered rock, slight yellow tinge to the creature due to the lighting from the camera rig

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