Most polychaete species spend their lives in burrows in the seabed. However, adult individuals of two species, Alitta ...

When the bottom-dwelling worms of Denmark’s fjords rise up in summer to spawn, they are predated by the resident jellyfish.

A newly observed feeding behavior suggests jellyfish may exploit short-lived seasonal events in surprising ways.

Jellyfish are opportunistic predators but it seems they've added these typically seafloor dwelling worms to the menu.

After ending up in the sheltered waters of the lake in Raja Ampat, the jellies evolved. Today, people can swim with them – if ...

Watch one of the strangest creatures in the ocean — a jellyfish that can effectively reverse its own life cycle. Instead of dying after reaching adulthood, this animal can transform itself back into ...