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 ...

Only two other species of these rare, curious beasts have been discovered to date. This new third species was discovered at Shukunegi Point on Sado Island in Japan, also inhabiting sponges. The ...

The marine worm Ramisyllis multicaudata, which lives within the internal canals of a sponge, is one of only two such species possessing a branching body, with one head and multiple posterior ends. An ...

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 ...

Branching marine worms are extremely rare: bizarre creatures with one head but a body that branches repeatedly into multiple posterior ends. Only three such species are known, and one of these worm ...

Scanning electron microscope image of branches of the newly discovered species of branching worm, Ramisyllis kingghidorahi. Credit: Professor M T Aguado Scanning electron microscope image of branches ...