Sea sponges are weird all on their own, but their tenants are even weirder. Many sponges are host to a variety of worm species which live inside their digestive canals. The exact nature of these ...

Scientists have uncovered the genetic underpinnings of one of the ocean's most bizarre animals: a branching marine worm named Ramisyllis kingghidorahi that lives inside sea sponges and reproduces in a ...