Description
Acanthastrea echinata, commonly known as Acan Echinata, is a highly prized large-polyp stony (LPS) coral valued for its intense coloration, sharply defined corallites, and thick, fleshy tissue. This species is known for its bold contrast between raised ridges and recessed valleys, often displaying vivid combinations of red, orange, green, blue, and metallic highlights that intensify under blue-spectrum lighting. Its compact growth form and dramatic visual texture make it a standout addition to LPS-dominant and mixed reef aquariums.
Native to Indo-Pacific reef environments, Acanthastrea echinata typically forms encrusting to massive colonies and is regarded as one of the more aggressive and visually striking species within the Acan group.
Lighting: Low to moderate (50–150 PAR); prefers stable lighting conditions—excessive intensity may cause tissue recession or color loss
Flow: Low to moderate; gentle, indirect flow supports healthy tissue expansion without damaging polyps
Placement: Bottom to mid-level areas on rockwork with ample spacing from neighboring corals
Temperature: 76–80°F (24–27°C)
Salinity: 1.0265 SG (35 PPT)
pH: 8.1–8.4
Alkalinity: 8–10 dKH
Calcium: 420–450 ppm
Magnesium: 1300–1400 ppm
Nutrients: Moderate; stable nitrate and phosphate levels help maintain coloration and tissue health
Feeding: Photosynthetic but responds strongly to target feeding 1–2 times weekly with mysis shrimp, reef roids, or finely chopped meaty foods
Aggression: High; extends potent sweeper tentacles—allow generous spacing from other corals
Growth Rate: Slow to moderate; prioritizes tissue density and color development
Care Level: Intermediate – hardy once established but sensitive to rapid parameter changes
Compatibility: Aggressive; best kept with significant spacing or isolated from delicate corals
