Colorful zoanthid coral polyps in a row on a dark background
CK Antimatter Zoanthid (Zoanthus sp.) polyp on black, top-down view

Species profile

CK Antimatter

Zoanthus sp.

Also sold as: CK Antimatter zoa, CK Antimatter zoanthid

CK Antimatter is a zoanthid with a near-black face, a glowing olive-yellow center and dark tentacles flecked with orange, red and yellow.

Colors

Olive-yellow glow around a pale slit mouth; a dark navy to near-black disc with fine radial lines and sparse orange specks; and dark navy tentacles mottled with orange, red and yellow patches

Care at a glance

Care level

Easy

Light

Medium

75-150 PAR

Flow

Moderate

Growth rate

Moderate

Placement

Lower to middle rockwork, ideally a spot near the front of the tank where the dark faces can be seen up close

Temperature

75 to 80°F (24 to 27°C)

Salinity

1.024-1.026 specific gravity (about 32-35 ppt)

Feeding

Mostly light-fed, with optional fine foods once or twice a week.

Photosynthetic; optional fine particulate food once or twice a week

Care notes

A dark morph: a near-black face with sparse orange specks and an olive-yellow glow at the center, ringed by dark tentacles flecked with orange, red and yellow. Under strong blue light the colors look more intense, and under whiter light they look softer. Care values here are typical for zoanthids, not measured for this morph: medium light, moderate, indirect flow and steady water. Give a new frag time to settle before judging its growth or color, and if it starts to pale, move it lower rather than changing several things at once. Zoa trade names are used loosely, and colonies sold under this name can look different, so buy from photos of the actual colony.

⚠ Palytoxin safety

Like any zoanthid, CK Antimatter may contain palytoxin, so treat it as toxic. Wear gloves and eye protection when handling or fragging, and wash up afterward.

Read the full Palytoxin Safety guide →