Zoanthids
Zoanthus sp.Lamarck, 1801Genus
Perfect entry-level soft coral with incredible color variety. Tolerant of water quality fluctuations and easy to propagate.

Fluorescence appearance


Coral fluorescent proteins are excited by blue/actinic light. Appearance differs greatly from under white light.
Names & Synonyms
- CommonZoanthids
- Commonマメスナギンチャク(ゾアンサス)
Overview
Zoanthids (order Zoantharia) are colonial hexacorals found across tropical and subtropical coral reefs of the Indo-Pacific and Atlantic. Their polyps, measuring 5–20 mm in diameter, display a remarkable spectrum of fluorescent colors—green, blue, red, yellow, and purple—earning them the nickname "gems of the sea." They thrive under moderate LED lighting (100–200 PAR) with gentle to moderate flow, making them highly accessible to beginners while remaining endlessly collectible for experienced hobbyists. Propagation via fragging is straightforward. Some species contain palytoxin, so handling with bare hands should be avoided.
Care Specifications
| Temperature | 24〜27℃ |
|---|---|
| Specific gravity | 1.023〜1.025 |
| Salinity | 33〜35 ppt |
| KH (carbonate hardness) | 8〜12 dKH |
| Lighting | Medium |
| Water flow | Medium |
| Placement | Middle |
Care Points
- Lighting—Moderate LED lighting sufficient
- Flow—Low to moderate
- Water Quality—KH 7-11, Ca 400-450ppm
- Notes—Some species contain palytoxin — handle with care
Regulatory & Conservation
- Notes:
- スナギンチャク目(Zoanthus, Zoantharia=マメスナ/ゾアンサス)。イシサンゴ目でない→CITES 非掲載。日本法も非該当。
Sources
- AlgaeBarn: Water Parameters 101(careSpec)
- DOC NZ / CITES-listed corals(Zoantharia 非掲載)(regulatory)
- Wikipedia(detail)
Related care articles

Mixed-Coral Tank Layout Planning | Co-existence Examples for SPS, LPS, and Soft Corals
When culturing different types of corals in a single tank, understanding each group's ecological niche—including their position in the food chain, light requirements, and water flow needs—and realizing competition avoidance through placement is key to success...

Choosing Substrate for Coral Tanks: Comparing Bare Bottom, Powder Sand, and Live Sand with Maintenance
The choice of substrate for a saltwater coral tank is directly connected not just to appearance but also to water quality management and the ecology of marine life. Here we organize the characteristics of bare bottom, powder sand, and live sand, and the management approach suited to each.

Saltwater Aquarium Quarantine (QT) Systems | Pathogen Management and Setup Methods for New Introductions
Explaining the importance of quarantine (isolation) processes when introducing new corals and organisms, along with practical setup methods. An implementation guide to realize preventative husbandry, from QT tank sizing and feeding to pathogen checking procedures and timing for introduction to the main tank.
Get this species
Buy livestock directly from breeders and specialist shops on BreederDirect (br-choku), our sister marketplace for corals and marine fish.
* Opens an external site (BreederDirect / br-choku, Japanese) in a new tab.