Pectinia Alcicornis Care Guide
Pectinia alcicornis · Saltwater LPS Coral

What Pectinia Alcicornis look like
Pectinia alcicornis, commonly known as the Honeycomb Coral, exhibits a distinctive morphology characterized by its thick, fleshy, and irregularly shaped corallites that form a convoluted, honeycomb-like structure. This large polyp stony (LPS) coral can reach a maximum diameter of approximately 30 centimeters (12 inches) under optimal conditions. The coral displays a range of colors, including green, brown, and yellow, often with contrasting patterns that enhance its visual appeal. Sexual dimorphism is not pronounced in this species; however, individual polyps can vary in size and shape, contributing to the overall colony's unique appearance. Defensive adaptations include the presence of nematocysts within the polyps, which can deliver mild stings to deter potential predators. Additionally, the coral's robust skeletal structure provides resilience against environmental stressors.
Behavior & temperament
Pectinia alcicornis exhibits a relatively passive behavior, often found in solitary or small clusters on the reef substrate. It typically extends its polyps during the night to feed on zooplankton and phytoplankton, utilizing its stinging tentacles to capture prey. This species does not exhibit aggressive territorial behavior towards other corals but can engage in competition for space and light with neighboring corals through overgrowth. The coral relies on both autotrophic and heterotrophic feeding strategies, forming symbiotic relationships with zooxanthellae, which provide essential nutrients through photosynthesis. Its polyp extension patterns are most pronounced during the evening hours, making it a fascinating subject for observation in a reef aquarium.
Diet & feeding
Pectinia alcicornis is primarily a heterotrophic feeder, consuming zooplankton and phytoplankton in its natural habitat. In captivity, it requires a diet supplemented with high-quality coral foods, including liquid or powdered foods rich in essential amino acids and fatty acids.
Behind the name
The genus name 'Pectinia' is derived from the Latin word 'pecten', meaning 'comb', referring to the comb-like structure of the coral's corallites. The species name 'alcicornis' comes from the Latin 'alci-' meaning 'elk' and 'cornis' meaning 'horn', likely referencing the horn-like appearance of the coral's growth form.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Pectinia Alcicornis?
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