Sabellastarte magnifica Breeding Guide

How the magnificent feather duster Sabellastarte magnifica reproduces sexually by broadcast spawning and asexually by fragmentation, regenerating its radiole crown.

Overview

Sabellastarte magnifica, the magnificent feather duster, is a Caribbean sabellid polychaete. The worm can reach about 10 cm in length, with a crown of branched radioles up to about 15 cm across, typically orange-brown with white tips. It lives in a tough, leathery tube and filter-feeds on plankton and suspended organic matter, using the radiole crown for both feeding and respiration. It occurs on sandy reefs in the Caribbean, the Bahamas and southeastern North America.

Reproductive Mode

As a member of Sabellastarte, the genus reproduces by both sexual and asexual means. Sexually, most worms are either male or female, with gametes maturing in the coelom before release into the water column and external fertilisation, and larger specimens may show sequential hermaphroditism.

Asexual Reproduction

Sabellastarte worms can reproduce asexually by fragmentation and regenerate body parts after damage, including rebuilding a lost branchial crown. This is the mechanism by which feather dusters can slowly increase in number within an established system.

Sexual Reproduction

After external fertilisation the larvae spend a short time in the plankton as trochophores before settling and developing into adult worms, the same pattern documented for the closely related Sabellastarte spectabilis.

Common Challenges

Reliable larval rearing in aquaria is impractical, while asexual fragmentation may occasionally yield new individuals. Crown shedding in response to stress or insufficient plankton is common and is usually followed by regeneration rather than death.