Don't forget that their anus is the same orifice as their mouth.

#Cnidarians

dsRNA injection to N. vectensis zygotes triggers mild and transient gene knockdown. Top: Schematic representation of the dsRNA carrying eGFP sequence used in this study and of the transgene of the actin::eGFP line [40]. Bottom left: Heterozygous actin::eGFP embryos showing dimmer eGFP fluorescence 24 hpi of dsRNA carrying eGFP sequence (left) compared to scrambled eGFP sequence (right). Scale bars represent 500 µm. Bottom right: No difference in eGFP fluorescence of heterozygous actin::eGFP embryos is exhibited 72 hpi of dsRNA carrying eGFP sequence (left) compared to scrambled eGFP sequence (right). Scale bars represent 500 µm.

#RNAi is an ancestral #antiviral system that degrades viral RNA, but what about in #cnidarians? @yehumoran.bsky.social &co show that #Nematostella has an siRNA-mediated antiviral response that lacks 2ary amplification & functions as a short-term antiviral mechanism @plosbiology.org 🧪 plos.io/3N192OD

dsRNA injection to N. vectensis zygotes triggers mild and transient gene knockdown. Top: Schematic representation of the dsRNA carrying eGFP sequence used in this study and of the transgene of the actin::eGFP line [40]. Bottom left: Heterozygous actin::eGFP embryos showing dimmer eGFP fluorescence 24 hpi of dsRNA carrying eGFP sequence (left) compared to scrambled eGFP sequence (right). Scale bars represent 500 µm. Bottom right: No difference in eGFP fluorescence of heterozygous actin::eGFP embryos is exhibited 72 hpi of dsRNA carrying eGFP sequence (left) compared to scrambled eGFP sequence (right). Scale bars represent 500 µm.

#RNAi is an ancestral #antiviral system that degrades viral RNA, but what about in #cnidarians? @yehumoran.bsky.social &co show that #Nematostella has an siRNA-mediated antiviral response that lacks 2ary amplification & functions as a short-term antiviral mechanism @plosbiology.org 🧪 plos.io/3N192OD

dsRNA injection to N. vectensis zygotes triggers mild and transient gene knockdown. Top: Schematic representation of the dsRNA carrying eGFP sequence used in this study and of the transgene of the actin::eGFP line [40]. Bottom left: Heterozygous actin::eGFP embryos showing dimmer eGFP fluorescence 24 hpi of dsRNA carrying eGFP sequence (left) compared to scrambled eGFP sequence (right). Scale bars represent 500 µm. Bottom right: No difference in eGFP fluorescence of heterozygous actin::eGFP embryos is exhibited 72 hpi of dsRNA carrying eGFP sequence (left) compared to scrambled eGFP sequence (right). Scale bars represent 500 µm.

#RNAi is an ancestral #antiviral system that degrades viral RNA, but what about in #cnidarians? @yehumoran.bsky.social &co show that #Nematostella has an siRNA-mediated antiviral response that lacks 2ary amplification & functions as a short-term antiviral mechanism @plosbiology.org 🧪 plos.io/3N192OD

Are you going to SICB in Jan2026? I can't but I'll be there in spirit with these plates I am donating for the Division of Invertebrate Zoology Libbie Hyman Auction. Show up and support student travel funds by bidding for them! Featuring #membracids #acoels #cnidarians #rotifers @sicb.bsky.social

One of ICB's frequently read papers
Investigating the #evolution and features of regeneration using #cnidarians

@aidemm.bsky.social

doi.org/10.1093/icb/...

The ability to #regenerate can greatly vary between #animal groups and cell types...

#science #biology #biologists

Three blue buttons; they look like flat circular disks with polyps resembling tentacles radiating out from them

Porpita porpita - blue button (2021)

They drift on the surface of the ocean, they sting, they're cute. As usual the cnidarians are pro at living out my life goals, 10/10 invertebrate

#invertebrates #cnidarians #hydrozoans #art #sciart

✨ This week's DB seminar was presented by Sosuke Fujita a postdoc in the Ikmi group @aikmi.bsky.social @embl.org. His research focuses on the role of neuropeptide signaling in development and regeneration using Nematostella as a model organism #devbio #regeneration #cnidarians

Ceramics plate in hues of blue with different organisms as the pattern.

New platter with all kinds of inverts! #sciart #ceramics #handbuilding #pottery #larvae #annelids #seaurchin #octopus #embryo #cnidarians #nematostella #veliger #snail #ascidians #nudibranchs

PhD scholarships in cnidarian-dinoflagellate symbiosis (Victoria University, Wellington, New Zealand)

For more information please email Prof. Simon Davy at simon.davy@vuw.ac.nz

#coralreefs #cnidarians #phd #scholarship #dinoflagellate #symbiosis #marinebiology

A cluster of giant green anemones at low tide with sand and rocks visible just under the water, and a large rock protruding from the water on the right hand side of the image. Two of the anemones are light in color, but one is larger than the others and is more green than the others.

Anemones during low tide at one of the most beautiful spots on the Washington peninsula, Ruby Beach

#TidesOutTuesday #WestCoast #GiantGreenAnemone #Invertebrates #MarineLife #Cnidarians #Nematocysts #Photography #RockinTuesday #PNW

Aide Macias-Muñoz is recruiting graduate #students for Fall 2026.

macias.sites.ucsc.edu

Our lab uses #cnidarians (#jellyfish and relatives) as a model organism to study the #genetics that might be conserved or independently evolved for similar traits to arise.

email
amacia16@ucsc.edu
with ?s

Hydra body plan and cell types. Here is a diagram of the Hydra body plan to show the location of the basal disc, body column, hypostome, and tentacle and denote the ectodermal and endodermal cell layers in Hydra. In the endodermal layer, there are gland cells (gl), ganglion neurons (gn), and epithelial cells (ep). In the ectoderm there are sensory neurons (sn), interstitial stem cells (i), epithelial cells (ep), and nematocytes (n). The two cell layers are separated by an extracellular matrix known as mesoglea (me). Adapted from Technau and Steele (2011) and Siebert et al. (2019).

ICB Issue 3
Shedding Light on Patterns of Unconventional Expression of Opsin #Genes in Hydra vulgaris
Marina Stoilova, Natasha Picciani, @aidemm.bsky.social , Todd Oakley
doi.org/10.1093/icb/...

#cnidarians #jellyfish #anemones #cell #hydroid #science

Osayra is reading a booked titled “Cnidarians”. The front cover features a green hydra, while the back cover features a yellow jellyfish and green and purple corals.

PFFFF my boy, relax your face!
#kaiju #kaijuart #digitalart #monsterart #oc #ocsky #cnidarians #reading #art #myart #monsters #illustration

A clustered colony of strawberry anemones in a fish tank

A colony of strawberry anemones at the Monterey Bay Aquarium

#MarineLife #CorynactisCalifornica #Cnidarians #ColorADay #PinkMon #MacroMonday #Photography #Corallimorpharia

Australian water dragon (Intellagama lesueurii)

Eastern gray kangaroo (Macropus giganteus)

Banksia shieldbug (Poecilometis eximius).

Anemone mutabilis

It's not all ogling birds at our campsites on our @palnam.bsky.social roadtrip. There are #reptiles, #mammals, #insects, and #cnidarians too! Names in ALT text! #kangaroo #lizard #dragon #anemone #Australia #nature

Common Guillemot

Lion's Mane Jelly

Lion's Mane Jelly

Atlantic Grey Seal

A Boat Trip around Puffin Island today produced c20 Grey Seal, Common Guillemot, Black Guillemot, Manx Shearwater, Fulmar, c20 Kittiwake, Compass Jelly, c70 Shag, and it was great to get close views of Lion's Mane #Jellyfish!

#Cnidarians #Birds #Birding #Wales #Photography #Nature #Wildlife #photo

🚀 Did you know that the Nematostella has a pressure-sensitive aboral valve? This valve operates independently of digestion. Find out more in the new preprint from the Ikmi group @aikmi.bsky.social at the DB unit @embl.org 👇 #DevelopmentalBiology #cnidarians #morphogenesis #ECM

✨This week's DB seminar @embl.org featured Mohannad Dardiry, a postdoctoral fellow in the Ikmi group @aikmi.bsky.social. Mohannad's research focuses on using phenotypic plasticity as a framework to understand decision-making in Cnidarians within changing environments #DevBio #Cnidarians

Don't miss @aidemm.bsky.social co authored blog and her ICB work
Investigating the #evolution and features of #regeneration using #cnidarians
Aide Macias-Muñoz
doi.org/10.1093/icb/...

A close-up of a giant green anemone with others close by and behind it.

A giant #green anemone for #BlueSkyArtShow

#MarineLife #Cnidarians #Anemone #PNW #PugetSound #SeattleAquarium #Invertebrates #Photography

A giant green anemone with others behind and around it

A giant green anemone for #acoloradAyPRIL #Green

#PNW #PugetSound #Invertebrates #MarineLife #Cnidarians

ICY INVERTS Cruise NBP 25-01 Our team of four scientists who study the biology of marine invertebrate animals (i.e., animals without backbones) will board the R/V Nathaniel B. Palmer in Lyttleton, New Zealand on....

Be sure to follow ICB coauthor, Kevin Kocot's recent #NSF funded project www.icyinverts.com
& read
Employing Phylogenomics to Resolve the Relationships among #Cnidarians, #Ctenophores, Sponges, #Placozoans, & #Bilaterians

Whelan, (@)kmkocot on Instagram, & Halanych

doi.org/10.1093/icb/...

A perfectly round, disc-shaped translucent object, about a centimetre across, lying on beach sand. There are intricate radial and circumferential structures, and the surface has a tightly sinusoidal appearance. It's the skeleton of a marine colony organism, the blue button (Porpita porpita).

As you wish...
The skeleton of a blue button (Porpita porpita), beautiful both alive and dead

#photography #macrophotography #porpita #hydroids #cnidarians #skeleton #marine #beach #EastCoastKin

From today's #GEOS308 lab at #UAGEOS on #Protists, #Porifera, and #Cnidarians, we got to see some #Fusulinid #foraminifera from the Earp formation in #Arizona dating to the #Pennsylvanian to #Permian transition some ~300–280 million years ago—cool stuff!

#fossils #paleontology

Sydney standing in front of a screen with various cnidarians on it. She is wearing comically large orange jellyfish earrings in her lobes and an orange coral earring in her cartilage

Do you think people can tell that I'm teaching #cnidarians today

Cnidofest 2026 is happening! Mark your calendars and plan to join us in Woods Hole! #cnidarians #cnidofest

Our latest Dive In Pack is here! Aimed at primary & early secondary pupils, this pack will teach them all about #Cnidarians.

https://buff.ly/3DEgZEI

With thanks to the William T. Grant Foundation, Hugh Fraser Foundation & Foyle Foundation for supporting our learning activities.

#Education #STEM

You can see these beautiful creatures in the Into the Deep/En lo Profundo exhibition at @montereyaq.bsky.social, www.montereybayaquarium.org/visit/exhibi... 🦑 #DeepSea #MarineLife #jellies #cnidarians