Common name: Slender Ragworm

General information

The Ragworm, also known as the King Ragworm or Sandworm, is a species of polychaete worm belonging to the family Nereididae. Nereis pelagica is known for its segmented body and paddle-like parapodia that aid in locomotion. These worms are often used as bait in fishing due to their vigorous movements and appealing scent to fish.

In the aquarium hobby, they are not commonly kept due to their predatory nature and potential to harm other tank inhabitants. However, they can be an interesting addition to a species-specific or biotope aquarium that mimics their natural environment.

Care

Ragworms require a sandy or muddy substrate to thrive, as they burrow and create tunnels. They are carnivorous and need a diet of meaty foods such as small fish, crustaceans, or specially formulated feeds for carnivorous invertebrates. Care should be taken to ensure they do not predate on desirable aquarium inhabitants.

Reproduction

Nereis pelagica reproduces by a process called epitoky, where a part of the worm transforms into a reproductive form called an epitoke during the breeding season. These epitokes are filled with eggs or sperm and will swim to the surface to release their gametes for external fertilization.

Habitat

Ragworms are found in marine environments, often in intertidal zones where they inhabit sandy or muddy substrates. They are widespread along coastlines and can be found in various parts of the world, including the Atlantic Ocean and the Mediterranean Sea.