Coral Care Info Zoanthids

Zoanthids are one of the most popular and widely kept soft corals in the reef aquarium hobby, known for their vibrant colors, diverse patterns, and fast-growing colony structure. Often referred to simply as “zoas,” they can form colorful mats that spread across rockwork, creating eye-catching displays. Zoanthids are generally hardy and adaptable, making them a great choice for both beginners and experienced reef keepers.

Care Requirements

Lighting (PAR Range)

• Zoanthids typically thrive in 50-150 PAR.
• Moderate lighting helps maintain strong coloration and growth.
• Some varieties can tolerate higher light with proper acclimation.
• Always acclimate new colonies slowly, especially those from new arrival corals.

Flow

• Low to moderate flow is ideal.
• Flow helps keep debris off the polyps and promotes healthy opening.
• Too much direct flow can cause polyps to stay closed.
• Moderate flow supports consistent extension and growth.

Placement

• Can be placed in a wide range of locations in the tank.
• Often positioned on rockwork where they can spread and form colonies.
• Best placed on isolated rocks to control growth.
• Placement should be planned carefully in tanks with small polyp stonies corals, as zoanthids can spread onto nearby surfaces.

Aggression

• Not aggressive in terms of stinging.
• Can become invasive by spreading quickly across surfaces.
• May overgrow nearby corals if not managed.
• Best controlled through careful placement.

Growth Rate

• Moderate to fast growth rate.
• Can quickly form large colonies under stable conditions.
• Growth is often enhanced in nutrient-rich systems.
• Regular trimming may be needed to control spread.

Feeding

Zoanthids are primarily photosynthetic and do not require direct feeding to thrive. However, they can benefit from dissolved nutrients and occasional broadcast feeding. Newly added colonies from newest corals should be allowed to stabilize before introducing additional feeding.

• No direct feeding required in most reef tanks.
• Can benefit from fine particulate foods in the water column.
• Moderate nutrient levels often support faster growth.

Tank Compatibility

Zoanthids are highly compatible with most reef-safe fish and invertebrates, making them a staple in mixed reef aquariums. However, their ability to spread means placement is important. In tanks that include soft corals or other spreading species, they can compete for space and should be monitored.

• Compatible with most reef-safe tank inhabitants.
• Can overgrow slower corals if not controlled.
• Best placed where their spread can be managed.

Common Problems

• Polyps staying closed due to low flow or environmental stress.
• Algae growth covering the colony in high nutrient systems.
• Pests such as nudibranchs or spiders.
• Overgrowth that crowds out nearby corals.

Tips for Success

• Provide moderate lighting and flow for consistent opening.
• Place on isolated rocks to control spreading.
• Maintain stable water parameters.
• Inspect regularly for pests.
• Handle carefully, as some zoanthids can contain palytoxin.

Frequently Asked Questions

Are Zoanthids good for beginners?
Yes, zoanthids are one of the easiest corals to keep and are very forgiving, making them ideal for beginners.

Do Zoanthids spread quickly?
Yes, many zoanthids grow quickly and can cover rockwork if not managed.

Do Zoanthids need to be fed?
No, they primarily rely on photosynthesis, though they may benefit from nutrients in the water.

Are Zoanthids toxic?
Some zoanthids can contain palytoxin, so they should be handled carefully, especially when fragging.

Zoanthids are an excellent addition to reef aquariums, offering endless color variations and the ability to create vibrant, living carpets across your aquascape. With proper placement and care, they can thrive and enhance the overall look of your tank. You can explore more options in our zoanthids collection, browse new additions in our new arrival corals, discover standout pieces in our featured corals, learn about our systems on our facility page, and stay updated through the Extreme Corals news and updates blog.