CoralSaltwaterBeginner

Columnar Sandy Zoanthid

Palythoa nelliae

A hardy Indo-Pacific zoanthid that forgives beginner mistakes and rewards patience.

✨AI-generated illustration

About

Found across reef environments in the Indo-Pacific and along the coast of South Africa, Palythoa nelliae is a colonial zoanthid that forms encrusting mats of individual polyps embedded in a shared, often sandy or sediment-laden tissue called a coenenchyme. Like other palythoas, its polyps tend to be larger and more robust than those of closely related genera, with a somewhat flattened, button-like appearance when fully open. Coloration can vary depending on the specific population and local light conditions, with muted earth tones being typical of the genus. This species is considered a solid choice for newer reef keepers, as palythoas in general are among the more forgiving corals you can keep. Tolerant of imperfect conditions and generally undemanding once settled into a stable system. It does well under moderate lighting and appreciates moderate flow that keeps detritus from settling on the colony without blasting the polyps closed. It will slowly spread across available rock surfaces over time, which is worth keeping in mind when placing it near other corals. A standard precaution worth remembering with any palythoa: the tissue contains palytoxin, so basic protective measures like gloves during handling are genuinely important.

At a glance

Type: Coral
Water: Saltwater
Origin: Indo-Pacific Ocean; South Africa
Reef safe: Yes
Lighting: Moderate
Flow: moderate

Care guide

Place on rock or substrate where it can spread without smothering neighboring corals. Palythoas are slow but persistent encrusters. Moderate lighting and flow work best; avoid direct powerhead discharge that closes polyps repeatedly. Feed occasionally with liquid phytoplankton or small suspended foods, though established colonies rely heavily on photosynthesis and nutrient uptake. Always wear gloves when handling or fragging to avoid contact with palytoxin in the tissue. Avoid copper-based treatments entirely. Once acclimated, this species is hardy and tolerant of minor parameter swings.

Breeding

Fragging is straightforward: cut or peel desired sections from the mother colony using a razor or knife while wearing gloves, then attach fragments to rock with epoxy or let them settle on substrate. Polyps may retract for several days post-frag but typically recover within a week. Fragments grow slowly but reliably under stable conditions. No special water chemistry or temperature changes needed to trigger propagation.