We saw half a dozen of these off a family member’s dock in a tiny bay. So beautiful!

Share your favorite nudibranch and I will use them in a future week!

"The blue dragon stings worse than a man o' war." Trace the citations: it starts as a 1998 forum inference, becomes a Wikipedia statement, then the world's default caption. Peer-reviewed reports have said "similar" all along.

Also, a 2025 paper: it uses its cerata as hands to catch fish.

https://en.seaslug.world/blog/glaucus-atlanticus-blue-dragon

Samla riwo (maybe) from Komodo this morning.

OM-1, AOI, 2 x FotoCore GTM, 45 mm macro lens

So the bigger one is Facelina fusca, but I can't identify the other one 🥲 unfortunately this is the only photo I have where she isn't upside down. Anyone have any ideas?

Yes they are not nudibranchs but rather sap sucking slugs. This one from a different dive at Sangeang, AOI, Pany 45 macro, 2 x FotoCore strobes and the Pro 900 AOI +23 diopter. Not as sharp as I would like but it was quite currenty.

Enjoy

I got a little dopamine hit from looking at the colours of nudibranch, so I turned them into Hippers that can hang on desktop and make me happy ⋆｡𖦹 ˚ 𓇼 ˚｡⋆

Here is a nice little C. kuroshimae from Banto today. This was an interesting dive. Instead of one of my normal macro lenses, this was shot with an old Leitz 28 mm lens and a reversal ring ($6 from eBay). No auto anything, focus by moving the camera in and out, lighting by changing strobe power (f stop chosen before the dive). OM-1, reverse ring lens, AOI, 2x footcore GTM strobes

I saw my first two nudibranchs this summer, and I wondered if you all have any tips for better viewing. Both times I was wearing goggles, and one of those times the water was a mix of temperatures. I could only get a clear look at the first one by squinting and making a little viewing hole with my fingers. The other one was just impossible. Admittedly my underwater vision isn’t the best and they were swimming in pretty rough waves, but would it be easier with a snorkel mask In calmer water? They are so beautiful, and I want to see ask the details!

H. bullock from Komodo. Shallow dof on the Rhinophores.

From Bima on the Samambaia

Share your favorite nudibranch and I will use them in a future week!

Gonna hang him on my wall :)

(Tambja verconis)

Spring Beach, Orford, Tasmania, Australia.

A ceramic nudibranch based on the illustrations painted by the Japanese artist Kumataro Ito. Chief illustrator for the U.S. Bureau of Fisheries survey of the aquatic resources of the Philippine Islands (1907 – 1910).

Mine is in porcelain with underglaze coated in a clear crackle.

Share your favorite nudibranch and I will use them in a future week!

Local SoCal nudi, would likely be the state Nudibranch if we had one.

OM-1, Pany 45 macro, AOI housing 2x AOI strobes

Cool little guy

Real tiny guys. The first is a rabbit dorid, then two spotted triophas, a Janna's dorid, and lastly, two clown dorids.

Identification - Found in Swan River, Western Australia

Was wondering if anyone had a better idea on identification than me.

Had some community feedback/contribution
- consensus being baeolidia moebii
- better/clearer photos of identifying features

4th slide as reference photo for B. moebii

Swan River is brackish in the wintertime (when found) but changes to ocean salinity in the summertime

First two are opalescent nudibranchs, then two sorcerer's dorids, a San Diego dorid, a thick-horned nudibranch, and lastly a Monterey dorid. Photos were taken with an Olympus Tough TG7.