Sand Sifting Conch (Strombus maculatus) Care Guide
Strombus maculatus is a small Indo-Pacific conch that sifts the sand bed for detritus and algae, valued as an efficient reef-safe substrate cleaner.
Compiled by Aquairi from published sources · Published · Updated
Overview
Strombus maculatus is a small true conch of the family Strombidae, described by G. B. Sowerby II in 1842 and commonly called the spotted conch. The shell is a creamy off-white with streaks and spots of orange, yellow and brown, and the animal carries stalked eyes typical of conchs. It is popular in the marine aquarium hobby for its small size and its ability to maintain the sand bed.
Taxonomy
- Family: Strombidae
- Genus: Strombus
- Scientific name: Strombus maculatus
- Authority: G. B. Sowerby II, 1842
- Note: the current WoRMS combination is Canarium maculatum / Maculastrombus maculatus (2021 revision)
Habitat
The species occupies intertidal zones throughout the Indo-Pacific and is most common near atolls, coral islands and barrier reefs. It lives on sandy substrates where it forages, and in the aquarium it requires an open sand bed to behave naturally.
Tank requirements
- Minimum tank volume: 60 L
- Temperature: 24-26 °C (75-79 °F)
- pH: 8.1-8.4
- Carbonate hardness (dKH): 8-12
- Specific gravity: 1.024-1.026
- Adult shell size: 2-4 cm
- Lifespan: 2-4 years
- Open sand bed required for foraging
Diet
Sand sifting conchs spend the day moving over the sand bed, sifting the substrate for detritus, microalgae and uneaten food. They are effective members of a reef cleanup crew, and their movement helps aerate the sand. In tanks with little natural film, the diet can be supplemented with dried seaweed and small frozen foods.
Compatibility
The conch is peaceful and considered completely reef-safe; it stays on the bottom and does not irritate corals or harm beneficial sand microfauna. Predatory fish such as triggerfish and pufferfish will attack it and should be avoided.
Breeding
Reproduction requires a planktonic larval stage. While the genus reportedly reproduces in captivity at times, deliberate rearing is impractical for home aquarists.
Sand Sifting Conch (Strombus maculatus): Breeding Notes
Overview
Strombus maculatus is a small reef-dwelling conch of the family Strombidae that sifts sand for detritus and microalgae and bears the characteristic stalked eyes of the group. Conchs are herbivorous and detritus-feeding sand dwellers.
Sexing
Conchs are gonochoristic (separate sexes) with internal fertilization. External sexing of this small species is not documented in the sources reviewed; sexes are confirmed mainly during pairing and egg-laying.
Spawning & Eggs/Larvae
In Strombidae, females lay long gelatinous egg strands, and after internal fertilization the eggs hatch into pelagic veligers that feed and develop in the plankton before metamorphosing; in the well-studied queen conch metamorphosis occurs roughly 16–40 days after hatching. Because dwarf conchs may settle quickly, mature reef tanks occasionally see surviving benthic juveniles.
Common Challenges
Even in this exceptional group most larvae are lost to filtration and predation, so large-scale captive recruitment remains difficult; a deep, biologically rich sand bed improves the odds of crawl-away survivors.