#SeaslugDay
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coralreeffish.bsky.social
Oh, it's #SeaSlugDay! So to celebrate here is a beauty I photographed in the Philippines!
October 29, 2024 at 6:18 PM
saimihanma.bsky.social
SEND NUDIS!!

#SeaSlugDay
October 29, 2024 at 3:40 PM
franzanth.bsky.social
It's #SeaSlugDay, send nudibranchs.
a poster showing 12 different kinds of nudibranchs. some are frilled, others round and delightful, but they're all colorful. one literally looks like a yellow omelette.
October 29, 2023 at 3:09 PM
jopabinia.bsky.social
It's #SeaSlugDay 🦑
jopabinia.bsky.social Jo Wolfe, PhD @jopabinia.bsky.social · Apr 24
4 different #InverteFest nudibranch species (3 from the same dive) in Tulamben Bali, also added on inat. we'll see if my IDs are any good since there are lots of similar species...
www.inaturalist.org/observations...
nudibranch I guessed to be Phyllidiella pustulosa, which is oval shaped, black background, with irregular light blue/white bumpy patches and dark blue rhinopores nudibranch I guessed to be Pteraeolidia semperi, which is a FOOT LONG skinny one with repeated paired ruffled structures along its long long body, and white/purple striped tentacles 2 nudibranchs, Hypselodoris tryoni, fuckin. one is attached to the other face to butt, basically. they are white with purple margins and some dark spots and purple rhinopores nudibranch I guessed to be Pleurobranchus peronii, which is a chonker that looks to be made of bubbly stuff in dark red
October 29, 2024 at 11:01 AM
echinoblog.bsky.social
A #seaslugday post about nudibranch FEEDING echinoblog.blogspot.com/2016/10/seas...
October 29, 2025 at 4:01 PM
greyauk.bsky.social
Happy #SeaSlugDay !

#sciart
nudibranch watercolour sketch the nudibranch os bright orange
October 29, 2024 at 4:09 PM
terumbudivers.com
#SeaSlugDay
October 29, 2025 at 10:18 PM
mbarinews.bsky.social
Happy #SeaSlugDay!

These sensational sea slugs bring some pizzazz to the deep sea. Check out the video: youtu.be/ZXdmGADEH-I?...
October 29, 2024 at 9:24 PM
terumbudivers.com
#SeaSlugDay
October 30, 2025 at 12:30 AM
ehrenenglish.bsky.social
#invertober 18, Anna's Magnificent Seaslug!

Today is also appropriately #SeaSlugDay!

#invertober2024 #SciArt #invertart #art #seaslug
Digital illustration of a blue, white and yellow-orange Seaslug on a pink background.
October 29, 2024 at 9:58 PM
drcraigmc.bsky.social
For #SeaSlugDay some species from Monterey Bay I did years ago. #MarineLife
October 29, 2024 at 3:59 PM
terumbudivers.com
#SeaSlugDay
October 30, 2025 at 2:27 AM
saimihanma.bsky.social
Watch out, I'm going to be sharing nudis all day for #SeaSlugDay
a translucent nudibranch, so clear you can see its insides, it has just a few cerata around its gills, which are tipped in yellow
October 29, 2024 at 3:54 PM
echinoblog.bsky.social
#seaslugday!
coastalpaleo.bsky.social Robert Boessenecker, Dr. of Whaleontology ™️ @coastalpaleo.bsky.social · Jul 1
Decent photo I got in May of a Lion's mane nudibranch, Melibe leonina, at the @montereyaq.bsky.social - a unique filter feeding sea slug from the kelp forests of the Pacific coast! Totally bizarre, wonderful critter: I want to see one while doing some kelp forest snorkeling.
October 29, 2025 at 3:28 PM
terumbudivers.com
#SeaSlugDay
October 30, 2025 at 1:59 AM
xenomatt.bsky.social
Bonus #SeaSlugDay post: Nembrotha kubaryana, which is probably my favourite nudibranch. Pic from Lembeh.

#MarineLife #Invertebrate 🌿
A head-on view of a black sea slug with bright markings. It has green lines on its body and bright orange gills, rhinopores and tentacles #UnderwaterPhotography #Macro #NaturePhotography #WildlifePhotography #Wildlife #Nature
October 29, 2025 at 10:30 PM
animal-aspects.bsky.social
Resharing for a belated #SeaSlugDay
animal-aspects.bsky.social Animal Aspects (Art History Animalia) @animal-aspects.bsky.social · Oct 30
For #SeaSlugDay: Nudibranchia, Plate 43 in Kunstformen der Natur, 1904, #SciArt by Ernst Haeckel (German, 1834-1919).
🆔 key in ALT of 2nd image

commons.wikimedia.org/wiki/File:Nu...

commons.wikimedia.org/wiki/File:Ha...
digital scan of the original color plate same plate but with superimposed number labels 1-7 for ID key: 1 Hermaea bifida (Lovén) = Hermaea bifida (Montagu, 1815) 2 Aeolis coronata (Forbes) = Facelina auriculata coronata (Forbes & Goodsir, 1839) 3 Dendronotus arborescens (Alder) = Dendronotus frondosus (Ascanius, 1774) 4 Idalia elegans (Leuckart) = Okenia elegans (Leuckart, 1828) 5 Doto coronata (Lovén) = Doto coronata (Gmelin, 1791) 6 Tritonia Hombergii (Cuvier) = Tritonia hombergii Cuvier, 1803 7 Ancula cristata (Lovén) = Ancula gibbosa (Risso, 1818)
October 30, 2025 at 2:13 PM
terumbudivers.com
#SeaSlugDay
October 30, 2025 at 6:10 AM
cjbill.bsky.social
Did someone say #seaslugday?
October 29, 2024 at 8:49 PM
kjadiver.bsky.social
#SEASLUGDAY one of our locals - Moridilla fifo
#nudibranch #underwater #photography #diving #Ningaloo
October 30, 2025 at 12:24 AM
saimihanma.bsky.social
You didn't think I ran out of nudis did you? Here's a cockrell's dorid for #SeaSlugDay.
a whitish nudibranch with long club like cerata which are tipped with orange
October 29, 2024 at 10:33 PM
leighharlen.bsky.social
#SeaSlugDay you say????#art #sciart 🎨🐡
a fuzzy crochet Ardeadoris cruenta nudibranch. white and shades of yellow with red dots
October 29, 2024 at 7:19 PM
saimihanma.bsky.social
おはよございます日本!
ここにウミウシがいる

#SeaSlugDay
a tiny bright orange sea slug, like a little bunny
October 29, 2024 at 8:31 PM
echinoblog.bsky.social
#seaslugday
inaturalist.bsky.social iNaturalist @inaturalist.bsky.social · Jun 7
You're currently looking at Phylliroe bucephala — a parasitic sea slug that lives its life in the open ocean — and the colorful stuff is its guts (and their contents).

📷 alaineden on iNaturalist
📍 Guadeloupe
🔗: www.inaturalist.org/observations...
#ObservationOfTheDay
A translucent creature floats against a black background. It has two long rhinophores and bright yellow and orange speckles in its body cavity.
October 29, 2025 at 4:12 PM
echinoblog.bsky.social
#seaslugday!
coastalpaleo.bsky.social Robert Boessenecker, Dr. of Whaleontology ™️ @coastalpaleo.bsky.social · Jan 31
Another chromodorid nudibranch (sea slug) from the southern California coast - a California blue, Felimare californiensis! Incredible colors! Much more common than the purple MacFarland's, and larger, but ecologically similar as a sponge predator (e.g. 1st pic). 🦀🦑 #tidepooling 📸OlympusTG6
A blue sea slug with golden yellow spots feeding on pale yellow sponges that look like egg-shaped masses with large holes; the image is repeated as a reflection on the still water surface, making the photo a bit trippy. A blue sea slug with yellow spots crawls in a tidepool; a pale oval structure with two large holes ominously lays in the background - the siphon of a rock-boring clam. The head of the blue sea slug; the "nose" is rounded and there is a pale blue stripe around the edge. In the deep dark navy blue center there is a cluster of circular golden yellow spots, and behind these, two even darker blue rhinophores ("antennae"); spots are more spaced out behind the rhinophores. The blue sea slug marches forth amongst a miniature jungle of red algae, green algae, pink algae, and delicate hydroids.
October 29, 2025 at 3:28 PM