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Photo © Coral Stop

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Coral Stop Zoa Guide

Rainbow Troll Zoa

Also known as: CK Saturn's Rings

Rainbow Troll Zoas are a fast-growing strain originally released by Golden Basket Coral and also known as Cali Kid Saturn’s Rings. Their bright yellowish-green main coloration and contrasting rings give them a distinctive, eye-catching appearance. With strong growth and vibrant color, Rainbow Trolls make an excellent addition to any zoa collection.

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Identification

Main Color Yellow

Secondary Color Orange

Skirt Color Yellow

Mouth Color Purple

Polyp Size Large

Released By GB

Colors and appearance can vary under different aquarium lighting, flow and growing conditions. Use multiple characteristics when identifying a zoanthid.

Identification Guide

What Does a Rainbow Troll Zoa Look Like?

Rainbow Troll Zoas can be identified by comparing several characteristics of the polyp rather than relying on a single color. The dominant or main coloration is yellow. Secondary coloration includes orange. Around the outside of the polyp, the skirt is typically yellow. The mouth is purple.

They are classified in the Coral Stop Zoa Guide as having a large polyp size.

Aquarium lighting can significantly change how zoanthid colors appear, so compare the main color, skirt, mouth, rings and markings together when identifying Rainbow Troll Zoas.

Zoanthid Care

How to Grow Rainbow Troll Zoas

Rainbow Troll Zoas should be kept in a stable reef aquarium with appropriate lighting and water movement. Zoanthids are generally adaptable corals, but sudden changes in lighting, flow or water chemistry can cause polyps to remain closed or slow their growth.

Start Rainbow Troll Zoas in an area with moderate conditions and observe their polyp extension and coloration. If moving them into stronger lighting, acclimate them gradually rather than making a sudden change. Provide enough water movement to keep debris from settling on the colony without directing an excessively strong stream directly at the polyps.

Lighting Low to moderate; acclimate gradually to stronger light

Water Flow Low to moderate, with enough movement to prevent debris buildup

Placement Rockwork or frag plugs with room for the colony to spread

Feeding & Nutrition

What Should You Feed Rainbow Troll Zoas?

Zoanthids receive much of their energy from light through their symbiotic algae, but supplemental feeding can provide additional nutrition. Small-particle coral foods and feeding-response supplements can be used as part of a balanced reef-feeding routine.

When feeding Rainbow Troll Zoas, use small amounts and avoid allowing excess food to accumulate around the colony. Below are several zoanthid and coral-feeding products available from Coral Stop.

Polyp Lab Polyp-Booster

$21.99

View Product →

History & Lineage

Origin and History of Rainbow Troll Zoas

The Rainbow Troll Zoa is documented in the Coral Stop Zoa Guide as having been released by GB.

Trade names and lineage information in the reef aquarium hobby can vary between vendors and collectors. Identification should therefore also be based on the coral's visible characteristics rather than its name alone.