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Emil

@bergylta.bsky.social

Marine biologist, Scuba diver, underwater photographer and overall sea enjoyer from the dark cold waters of Sweden. I specialize in Nordic benthic marine macrofauna May or may not be found in a corner drinking coffee 🦑🪼🪸

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Emil@bergylta.bsky.social · 5d ago

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.
Emil@bergylta.bsky.social · 2w ago

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 substratumA 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 substratumA 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 towards the viewer.
Emil@bergylta.bsky.social · 4w ago

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.
Emil@bergylta.bsky.social · last yr.

#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.
Emil@bergylta.bsky.social · last yr.

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 algaeClose 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
Emil@bergylta.bsky.social · last yr.

#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 behindA small grey-ish seaslug with white "antennae" crawling down a wallA small grey-orange seaslug crawling towards the viewerA small brown-ish seaslug with white antenna-tips crawling over some algae towards the camera
Emil@bergylta.bsky.social · 2y ago

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
Emil@bergylta.bsky.social · 2y ago

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 themClose 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.
Emil@bergylta.bsky.social · 2y ago

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 seafloorClose up face of a blue-green polychaete worm with a metallic sheen, the worm is crawling among some brown algae
Emil@bergylta.bsky.social · 2y ago

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 glitteringSediment 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
Emil@bergylta.bsky.social · 2y ago

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.
Emil@bergylta.bsky.social · 2y ago

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 lensClose 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 seafloorClose-up side profile photo of a small semi-transparant shrimp with orange-red pigment dots, white legs and blue-grey eyes. The shrimp is crawling on a beige-brown soft mud seafloor
Emil@bergylta.bsky.social · 2y ago

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
Emil@bergylta.bsky.social · 3y ago

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