Zoanthid Coral Starter Care Guide
A practical introduction to zoanthid coral care, including health risks, water quality, tank setup, food and behaviour.
Use this guide to notice and organize information. Contact a qualified veterinarian for medical concerns or urgent change.
About the Zoanthid Coral
Zoanthids are colourful colonial polyps that spread across rock in a connected mat. Many are hardy and aquarium-propagated frags are widely available, but different varieties can grow and compete at very different speeds.
Some zoanthids can contain palytoxin. You cannot tell whether a colony is safe by its colour, name or appearance.
Health risks to know about
For the coral, important concerns include sudden salinity or light changes, pests, bleaching, tissue loss, algae overgrowth, copper exposure and stings from nearby corals.
For people and pets, treat every zoanthid as potentially toxic. Never boil, steam, scrub with hot water or use power tools on zoanthid-covered rock. Avoid fragging unless properly trained, use eye and skin protection, keep children and pets away and seek urgent poison-control or medical advice after a suspected exposure.
Tank, water and equipment
Use a mature, fully cycled reef aquarium with stable rock placement, species-appropriate light and moderate flow that keeps debris from settling without blasting the polyps.
Measure salinity with a calibrated refractometer. A specific gravity around 1.023 to 1.026 is a common coral range, with stable alkalinity, calcium, magnesium and nutrient levels.
Food and feeding
Most common zoanthids receive much of their energy from light and may also capture very small suspended foods.
Avoid heavy feeding that leaves food or algae covering the colony.
Behaviour, tank mates and enrichment
Polyps opening during the light period and closing briefly after disturbance can be normal. A whole colony staying closed for days needs a water, pest, flow and lighting review.
Give the colony room to spread and keep it away from stronger stinging corals. Some angelfish and butterflyfish may nip the polyps.
When to contact an aquatic veterinarian
Get help for gasping, collapse, severe wounds, major swelling, inability to stay upright, rapid unexplained deaths or a problem that continues after water parameters are corrected.
Test ammonia, nitrite, nitrate, pH, temperature and salinity whenever behaviour changes. Water quality is part of the medical history, so record results before contacting an aquatic veterinarian.
Read the supporting material
These sources stay with their original publishers. WiseTails links to them and provides its own summary; it does not republish their text or images.
Supports the species-specific care summary for Zoanthid Coral.
Original source ↗02professional org · Ornamental Aquatic Trade AssociationHow to Test for Water Quality in a Marine Tank / AquariumSupports the aquarium cycling and water-quality context used in this guide.
Original source ↗03government · U.S. Centers for Disease Control and PreventionSuspected Palytoxin Inhalation Exposures Associated with Zoanthid Corals in Aquarium Shops and HomesSupports the human-safety warning about possible palytoxin exposure from some zoanthid corals.
Original source ↗