For almost two decades, scientists have debated whether sponges or comb jellies are the first animal lineage. Now some are ...

For more than 500 million years – well before dinosaurs ever thought of existing – jellyfish have floated through the world’s oceans. Today, 2,000 species of jellyfish have been discovered around the ...

Scientists have discovered which animal was the first to branch off from our collective common ancestor. For years, debate had raged over whether the first to diverge was the sea sponge or the comb ...

In the world of phylogenetics, there’s team sponge and team comb jelly. Which creature roots the animal tree of life — the simple sponge or the more complex comb jelly — has stirred fierce debate ...

The ctenophore, Mnemiopsis leidyi, can make its own coelenterazine to create this beautiful bioluminescent display. Credit: Manabu Bessho-Uehara In the pitch-black environment of the deep sea, light ...