We know that some animals are bilaterian—meaning they display bilateral symmetry—while others are not, but nature is rarely ...

Sea anemones may hold the key to the ancient origins of body symmetry. A study from the University of Vienna shows they use a ...

A marine biologist claims to have found an animal off the coast of Mallorca that had been missing for nearly three ...

The problem with jellyfish is that their stinging cells can remain active even after the animal is dead. Fishermen complain ...

The presence of BMP shuttling in both cnidarians and bilaterians suggests that this molecular mechanism predates their evolutionary divergence some 600-700 million years ago. "Not all Bilateria use ...

Incredible images created by our scientists using advanced microscopes are helping to drive biological discovery ...

A renowned marine biologist claims to have made a spectacular discovery off the coast of Mallorca: She reports having seen ...

Jellyfish, ancient and diverse, exhibit remarkable adaptations, from bioluminescence to immortality. These gelatinous creatures, mostly water, thrive ...

In contrast, cnidarians, such as jellyfish and sea anemones, are traditionally described as radially symmetric, and indeed jellyfish are. However, the situation is different is the sea anemones ...

Some jellyfish species are incredibly dangerous because of their potent venom. For example, the box jellyfish has toxins that can cause extreme pain, paralysis, and even death in humans.

5. Sea Pens Colonial Light Producers Sea Pens. Image via Openverse. Sea pens (order Pennatulacea) are colonial marine cnidarians resembling antique quill pens that demonstrate remarkable coordinated ...