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At the Museum, the exhibition "Mysterious Creatures from the Ocean" could be admired by visitors, with the amazing images from Jeffery Stone & Alexander Semenov! #EuropeanResearchersNight #bluenightstorreira #OceanDecade Universidade Aveiro @DiatomsATTACK Alexander Semenov

A huge mouth of Beroe cucumis would also fit in nicely in #CtenophoreDay

Finally got my hands on the photos again! What a joy to clean and handle them.

Cyanea capillata (aka Lion's mane), one of the most beautiful jellyfish in the Arctic. The lion's mane of tentacles have gone a little bald, but the jellyfish still looks amazing.

Coryphella nobilis is one of my favorite nudibranchs. Every time I get excited when I meet these guys with thick, vibrant papillas!

Lucernaria sainthilarei, lovely little stalked jellyfish. They live on muddy parts of the seafloor, clinging to boulders and small rocks. Usually these are places with gentle currents and depths greater than 15-20 meters.

Alitta virens polychaetes flying around. This is their breeding behaviour: for a couple of days a year they float en masse from the bottom to the surface to spawn and release their sexual products into the water. The fertilisation is external, so this is how system works.

SpaceX new booster! Alitta virens polychaete discharging sperm at full speed while the eggs (little dots in the picture) are already floating all around in the vast space of the White sea.

Sea angel - Clione limacina. They can be chubby!

Pink helmet jellyfish - Aglantha digitale. 1cm of lighting fast hydrozoan beauty.

Strange body shape of Bolinopsis infundibulum ctenophore.

Upside down Lion's mane jellyfish without the mane. Happy New 2025!

Dendronotus niveus nudibranch: big guy in the icy waters of the White Sea. I’ve seen huge specimens up to 8-10 cm long.

Skeleton shrimps Caprella septentrionalis guarding kids.

Beautiful young Cyanea capillata jellyfish in the cold dark waters of the White sea.

Clione limacina, aka Sea Angel, is a small pteropod mollusk inhabiting northern seas. A creepy predatory creature with six huge hunting tentacles inside its head.

Lucernaria quadricornis, stalked jellyfish (stauromedusae) from the Laminaria forests of the White Sea.

Another staurozoan jellyfish, Lucernaria sainthilairei. Soft and tiny carnivorous creature hiding in the dark under the thermocline.

Polymastia arctica sponge features spine‑like projections (although they’re quite soft) that increase filtration surface area. Another function of these papillae is asexual reproduction: buds form at the tips of the papillae, detach, and give rise to new individuals.

Skeleton shrimp Caprella septentrionalis is sticking out of a shaggy seaweed. How it doesn’t get tangled with all its antennas and claws is beyond my understanding.