Hydractinia, a genus of colonial marine cnidarians, has been used as a model organism for
developmental biology and comparative immunology for over a century. It was this animal …

Across eumetazoans, the ability to perceive and respond to visual stimuli is largely mediated
by opsins, a family of proteins belonging to the G protein-coupled receptor (GPCR) …

In nervous systems, there are two main modes of transmission for the propagation of activity
between cells. Synaptic transmission relies on close contact at chemical or electrical …

We present an organism-wide, transcriptomic cell atlas of the hydrozoan medusa Clytia
hemisphaerica and describe how its component cell types respond to perturbation. Using …

Jellyfish (medusae) are a distinctive life-cycle stage of medusozoan cnidarians. They are
major marine predators, with integrated neurosensory, muscular and organ systems. The …

Jellyfish are radially symmetric organisms without a brain that arose more than 500 million
years ago. They achieve organismal behaviors through coordinated interactions between …

We present the genome of the moon jellyfish Aurelia, a genome from a cnidarian with a
medusa life stage. Our analyses suggest that gene gain and loss in Aurelia is comparable to …

The circadian clock enables anticipation of the day/night cycle in animals ranging from
cnidarians to mammals. Circadian rhythms are generated through a transcription-translation …

Animal eyes vary considerably in morphology and complexity and are thus ideal for
understanding the evolution of complex biological traits [1]. While eyes evolved many times …

Background Hydractinia symbiolongicarpus, a colonial cnidarian, is a tractable model
system for many cnidarian-specific and general biological questions. Until recently, tests of …