Breeding the Brunneus Turbo Snail (Turbo brunneus)
Turbo brunneus (bruneus) is a small Indo-Pacific dwarf turban snail with separate sexes that scatter eggs and sperm. Its planktonic larvae cannot be raised in a closed reef tank.
Overview
Turbo bruneus (Röding, 1798), traded as Turbo brunneus and called the brown dwarf turban or little burnt turbo, is a small turbinid with a sturdy brown shell about 20-50 mm long. It lives in the Red Sea and Indo-Pacific on coral reefs, rocky shores and seagrass beds, usually in shallow water. It is primarily herbivorous, scraping algae from surfaces with its radula, and is valued in nano reefs as a compact grazer.
Sexing
The species is dioecious, with separate male and female animals, but the sexes look the same externally. Males release sperm into the water current while females release eggs; there is no shell or body feature a keeper can use to tell them apart.
Spawning & Larvae
Females lay hundreds of small eggs enclosed in a jelly-like substance and attached to rocks or other hard surfaces, with fertilization occurring in the water. As in other Turbinidae, development proceeds through a swimming trochophore and a planktonic veliger that drifts and feeds before settling as a juvenile snail.
Common Challenges
- Planktonic veligers are captured by mechanical and protein filtration in a closed system.
- Separate-sex spawning with water-column fertilization cannot be staged in a display tank.
- Larvae need plankton-grade food and stable rearing conditions that aquaria do not supply.
- Natural settlement cues for metamorphosis are missing in a glass tank.